Abstract: The computer pattern recognition ( CPR ) technology is applied to the study on the relationships among dissolved oxygen ( DO) concentration and nine ecosystem factors in the Siniperca chuatsi ponds. The factors differ greatly in distinct ponds or periods . In high-dimensional space, it is clear and successful that two kinds of samples, high and low DO, gather themselves in different regions. It indicates markedly regular relationships between DO and ecosystem factors. The nine superiority ecosystem targets for maintain high DO are sought by CPR favorable technology. In water, DO and nine ecosystem factors follow polybasic quadratic function relation, R= 0. 97. Using the mathematical model prediction DO , precision is 9 3. 9% , predicting the DO is over 8. 4 mg/ L for favorable ecosystem factor.