An electric power steering control system comprising: a motor (6) for adding a steering assist force for a steering system; a steering force detecting section (2) for detecting a steering force of the steering system; a motor current determining section (104) for determining a motor current based on at least the detected by the steering force detecting section (2) steering force; a temperature sensing portion (75) for detecting an ambient temperature; a coefficient setting section (108) for setting a coefficient in accordance with a means of the temperature detecting portion (75) obtained detected temperature; a motor current detection section (107) for detecting a run to the motor current; Current based detected for calculating a maximum current limiting value to a by the motor current detecting section (107) has a maximum current limiting value calculation section (109) and the set by the coefficient setting section (108) coefficients; a current limiting section (105) for selecting the smaller value from the by the motor current determining section (104) determined motor current and calculated the by the maximum current limit value calculating section (109) the maximum current limit value, and outputting it as a target current; and a motor current control section (106) for guiding the target current to the motor (6) on ...