An intelligent control method for a traffic signal light, comprising: a roadside equipment receiving passing information of vehicles in a target passing intersection, the passing information being obtained and sent by a vehicle-mounted terminal which is arranged on each vehicle (101); determining a passing strategy of the target passing intersection according to the passing information (102); and controlling a traffic signal light in the target passing intersection according to the passing strategy (103). Also disclosed are a roadside equipment and a control system, which may effectively sense a passing state of a vehicle at an intersection, and may change a running strategy in a timely manner so as to achieve safe and efficient passing. At the same time, the method may be quickly applied to different intersection conditions.