This research is for purpose of developing the technique of searching shape data of CAD one based on XML using Metadata in web and developing the technique of transmitting search results nearly real time by internet. Also we have data compression algorithm in 3D Model. The algorithm can make real time transmission and sharing data of 3D Model, so we can store and transmit these data quickly and efficiently in internet.

This research considered topology and geometry information, especially location information and normal vector data as a compression object.