Abstract: The design of the fuzzy PID controller on the base of ROV working ship was introduced. After analyzing the characteristics of PID control and fuzzy control, the influence of the PID parameter＇s change on system performance was considered. Referring to the ideal of fuzzy control, the method of the fuzzy adjustment for PID parameters in dynamic process was studied emulated: The results show that the Fuzzy PID controller has Rood effect in control.