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+# Image Library and Process System
+
+### Prerequisites
+
+- Scrapy, see more details on [this page](http://doc.scrapy.org/en/0.22/index.html)
+- MongoDB, see more details on [this page](http://docs.mongodb.org/manual/)
+- pymongo, see more details on [this page](http://api.mongodb.org/python/current/)
+
+### Usage
+
+#### Do Operations on Images
+
+enter `python main.py` in command line
+
+#### Crawl Images
+
+change the allowed domain in `./crawler/crawler/spider/ImgCralwer.py` and then enter`scapy crawl img` in command line.
+
+### Storage
+
+#### Database
+
+All the image infomation is stored into MongoDB at the default ip and port, namely `localhost:27017`.
+
+#### Images
+
+All the image are downloaded into **Images** directory.
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