In order to inspect insect specimen in multi-angle on the internet, the authors introduced a method of 3-D insect specimen demonstration. Using self-developed shooting device and image processing technology, automatic modeling and virtual demonstrate method of 3D insect specimen image model were implemented. Based on those, the 3-D insect specimen network information system was built. In the system, the insect specimen could be modeled automatically, showed panoramically and reserved timelessly, which provided the data support for insect learning and researching.