To copy and refresh automatically function softwear concerning electric power system supervisory control by only the necessary and minimum function setting.

A computer 102 in this supervisory control equipment which connects plural computers with a control server through transmission lines and performs supervisory control of an electric power system with display means of the computers is provided with an agent program operating means 1022 which operates an agent program for copying the necessary function softwear by moving between the computers, an information transmitting means 1021 which delivers data through the transmission lines 101, a function softwear operating means 1023 which operates a function softwear concerning supervisory control on the computers, and a display means 1024. The control server 104 is provided with a function softwear storing means 1041, a function soft wear maintenance means 1042 for maintaining the function softwear, a function softwear transmitting means 1043 for transmitting the function softwear, and an information transmitting means 1044.