diff --git a/src/landppt/services/image/models.py b/src/landppt/services/image/models.py
new file mode 100644
index 0000000..38be712
--- /dev/null
+++ b/src/landppt/services/image/models.py
@@ -0,0 +1,318 @@
+"""
+图片服务数据模型
+"""
+
+from typing import List, Optional, Dict, Any, Union
+from pydantic import BaseModel, Field
+from enum import Enum
+import time
+from pathlib import Path
+
+
+class ImageSourceType(str, Enum):
+    """图片来源类型"""
+    AI_GENERATED = "ai_generated"
+    WEB_SEARCH = "web_search"
+    LOCAL_STORAGE = "local_storage"
+
+
+class ImageProvider(str, Enum):
+    """图片提供者"""
+    # AI生成
+    DALLE = "dalle"
+    STABLE_DIFFUSION = "stable_diffusion"
+    SILICONFLOW = "siliconflow"
+    POLLINATIONS = "pollinations"
+
+    # 网络搜索
+    UNSPLASH = "unsplash"
+    PIXABAY = "pixabay"
+    SEARXNG = "searxng"
+    GOOGLE_IMAGES = "google_images"
+
+    # 本地存储
+    LOCAL_STORAGE = "local_storage"
+    USER_UPLOAD = "user_upload"
+    SYSTEM_DEFAULT = "system_default"
+
+
+class ImageFormat(str, Enum):
+    """支持的图片格式"""
+    JPEG = "jpeg"
+    JPG = "jpg"
+    PNG = "png"
+    GIF = "gif"
+    WEBP = "webp"
+    BMP = "bmp"
+    TIFF = "tiff"
+
+
+class ImagePosition(str, Enum):
+    """图片在幻灯片中的位置"""
+    BACKGROUND = "background"
+    CONTENT = "content"
+    ICON = "icon"
+    DECORATION = "decoration"
+    HEADER = "header"
+    FOOTER = "footer"
+
+
+class ImageLicense(str, Enum):
+    """图片许可证类型"""
+    PUBLIC_DOMAIN = "public_domain"
+    CC0 = "cc0"
+    CC_BY = "cc_by"
+    CC_BY_SA = "cc_by_sa"
+    UNSPLASH_LICENSE = "unsplash_license"
+    PIXABAY_LICENSE = "pixabay_license"
+    CUSTOM = "custom"
+    UNKNOWN = "unknown"
+
+
+class ImageMetadata(BaseModel):
+    """图片元数据"""
+    width: int
+    height: int
+    format: ImageFormat
+    file_size: int
+    color_mode: Optional[str] = None
+    has_transparency: bool = False
+    dominant_colors: List[str] = Field(default_factory=list)
+    average_color: Optional[str] = None
+    brightness: Optional[float] = None
+    contrast: Optional[float] = None
+
+
+class ImageTag(BaseModel):
+    """图片标签"""
+    name: str
+    category: Optional[str] = None
+    confidence: float = 1.0
+    source: Optional[str] = None  # 标签来源：user, ai, api等
+
+
+class ImageInfo(BaseModel):
+    """图片信息"""
+    image_id: str
+    source_type: ImageSourceType
+    provider: ImageProvider
+    original_url: Optional[str] = None
+    local_path: str
+    filename: str
+    title: Optional[str] = None
+    description: Optional[str] = None
+    alt_text: Optional[str] = None
+    
+    # 元数据
+    metadata: ImageMetadata
+    
+    # 标签和关键词
+    tags: List[ImageTag] = Field(default_factory=list)
+    keywords: List[str] = Field(default_factory=list)
+    
+    # 版权信息
+    license: ImageLicense = ImageLicense.UNKNOWN
+    license_info: Optional[str] = None
+    author: Optional[str] = None
+    author_url: Optional[str] = None
+    source_url: Optional[str] = None
+    
+    # 使用统计
+    usage_count: int = 0
+    last_used_at: Optional[float] = None
+    
+    # 时间戳
+    created_at: float = Field(default_factory=time.time)
+    updated_at: float = Field(default_factory=time.time)
+    
+    def add_tag(self, name: str, category: Optional[str] = None, confidence: float = 1.0):
+        """添加标签"""
+        tag = ImageTag(name=name, category=category, confidence=confidence)
+        if tag not in self.tags:
+            self.tags.append(tag)
+    
+    def remove_tag(self, name: str):
+        """移除标签"""
+        self.tags = [tag for tag in self.tags if tag.name != name]
+    
+    def get_tags_by_category(self, category: str) -> List[ImageTag]:
+        """按分类获取标签"""
+        return [tag for tag in self.tags if tag.category == category]
+    
+    def update_usage(self):
+        """更新使用统计"""
+        self.usage_count += 1
+        self.last_used_at = time.time()
+        self.updated_at = time.time()
+
+
+class ImageSearchRequest(BaseModel):
+    """图片搜索请求"""
+    query: str
+    keywords: List[str] = Field(default_factory=list)
+    tags: List[str] = Field(default_factory=list)
+    
+    # 搜索参数
+    page: int = 1
+    per_page: int = 20
+    orientation: Optional[str] = None  # landscape, portrait, squarish
+    category: Optional[str] = None
+    color: Optional[str] = None
+    
+    # 尺寸要求
+    min_width: Optional[int] = None
+    min_height: Optional[int] = None
+    max_width: Optional[int] = None
+    max_height: Optional[int] = None
+    
+    # 许可证要求
+    license_types: List[ImageLicense] = Field(default_factory=list)
+    
+    # 提供者偏好
+    preferred_providers: List[ImageProvider] = Field(default_factory=list)
+    excluded_providers: List[ImageProvider] = Field(default_factory=list)
+
+
+class ImageGenerationRequest(BaseModel):
+    """AI图片生成请求"""
+    prompt: str
+    negative_prompt: Optional[str] = None
+    
+    # 生成参数
+    width: int = 1024
+    height: int = 1024
+    quality: str = "standard"  # standard, hd
+    style: Optional[str] = None  # vivid, natural
+    
+    # 提供者特定参数
+    provider: ImageProvider = ImageProvider.DALLE
+    model: Optional[str] = None
+    steps: Optional[int] = None
+    guidance_scale: Optional[float] = None
+    seed: Optional[int] = None
+    
+    # 批量生成
+    num_images: int = 1
+
+
+class ImageUploadRequest(BaseModel):
+    """图片上传请求"""
+    filename: str
+    content_type: str
+    file_size: int
+
+    # 可选信息
+    title: Optional[str] = None
+    description: Optional[str] = None
+    tags: List[str] = Field(default_factory=list)
+    category: Optional[str] = None
+
+    # 来源信息
+    source_type: Optional[ImageSourceType] = None  # 实际来源类型，如果为None则默认为LOCAL_STORAGE
+    original_url: Optional[str] = None  # 原始URL（用于网络图片）
+
+    # 处理选项
+    auto_resize: bool = True
+    auto_optimize: bool = True
+    generate_thumbnails: bool = True
+
+
+class ImageProcessingOptions(BaseModel):
+    """图片处理选项"""
+    # 尺寸调整
+    resize_width: Optional[int] = None
+    resize_height: Optional[int] = None
+    maintain_aspect_ratio: bool = True
+    resize_method: str = "lanczos"  # lanczos, bicubic, bilinear
+    
+    # 格式转换
+    output_format: Optional[ImageFormat] = None
+    
+    # 质量优化
+    quality: Optional[int] = None  # 1-100
+    optimize: bool = True
+    progressive: bool = False
+    
+    # 图片增强
+    auto_enhance: bool = False
+    brightness: Optional[float] = None
+    contrast: Optional[float] = None
+    saturation: Optional[float] = None
+    sharpness: Optional[float] = None
+    
+    # 水印
+    add_watermark: bool = False
+    watermark_text: Optional[str] = None
+    watermark_position: str = "bottom_right"
+    watermark_opacity: float = 0.5
+
+
+class ImageSearchResult(BaseModel):
+    """图片搜索结果"""
+    images: List[ImageInfo]
+    total_count: int
+    page: int
+    per_page: int
+    has_next: bool
+    has_prev: bool
+
+    # 搜索统计
+    search_time: float
+    provider_results: Dict[str, int] = Field(default_factory=dict)
+    provider: ImageProvider
+    error: Optional[str] = None
+
+
+class ImageOperationResult(BaseModel):
+    """图片操作结果"""
+    success: bool
+    message: str
+    image_info: Optional[ImageInfo] = None
+    error_code: Optional[str] = None
+    processing_time: Optional[float] = None
+
+
+class ProjectImageAssociation(BaseModel):
+    """项目图片关联"""
+    project_id: str
+    image_id: str
+    slide_index: int
+    position: ImagePosition
+    
+    # 位置和样式信息
+    x: Optional[float] = None
+    y: Optional[float] = None
+    width: Optional[float] = None
+    height: Optional[float] = None
+    z_index: Optional[int] = None
+    
+    # 样式属性
+    opacity: float = 1.0
+    rotation: float = 0.0
+    border_radius: Optional[float] = None
+    shadow: Optional[Dict[str, Any]] = None
+    
+    # 动画效果
+    animation: Optional[Dict[str, Any]] = None
+    
+    created_at: float = Field(default_factory=time.time)
+
+
+class ImageCacheInfo(BaseModel):
+    """图片缓存信息"""
+    cache_key: str
+    file_path: str
+    file_size: int
+    created_at: float
+    last_accessed: float
+    access_count: int
+    expires_at: Optional[float] = None
+    
+    def is_expired(self) -> bool:
+        """检查是否过期 - 图片永不过期"""
+        return False
+    
+    def update_access(self):
+        """更新访问信息"""
+        self.last_accessed = time.time()
+        self.access_count += 1