By using the demonstration analyse method, five economy computation model on the relation on science and technology's devotion and economic increase are founded. In the model, Shanghai and Chongqing are considered as the representations of East China and West China respectively. For Shanghai and Chongqing, the dedicative rates of science and technology's devotion to economic increase are gained respectively and studied comparatively. According to this model, some quantitative gists are provided for the policy and layout on science and technology of West and East China.