15 conventional monitoring sections, which were located in the same location with automatic monitoring stations, distributed in different river basins, were selected to compare the data obtained by both manual monitoring and automatic monitoring. The results showed that the monthly mean values of automatic monitoring were not comparable to the data of manual monitoring due to the deviation of sampling time and sampling location. In terms of water quality evaluation, at least 4 methods were available: evaluated by 5 parameters obtained from automatic monitoring, evaluated by 5 parameters obtained from manual monitoring, evaluated by 21 parameters obtained from manual monitoring, and evaluated by the integrated 5 automatic parameters and 16 manual parameters. Compared with method one and method two, the sum of same class and one class varied accounted for about 85%, compared with method one and method three, it accounted for about 80%, and compared with method three and method four, it accounted for about 90%.Therefore,this is a more reasonable method of surface water quality evaluation.