The invention discloses a strip steel winding temperature control method and device and a strip steel machining system, and relates to the technical field of strip steel production. The method comprises the steps that a corresponding speed compensation factor is looked up according to the target thickness and target temperature parameters of strip steel; a corresponding speed gain coefficient is found from a second corresponding table according to the strip steel rolling speed; the strip steel rolling speed is corrected based on the speed compensation factor and the speed gain coefficient, andthe corrected strip steel speed is obtained; and according to the corrected strip steel speed, the cooling efficiency of laminar cooling equipment is adjusted. Through the method, dynamic regulationof the cooling efficiency of the laminar cooling equipment can be achieved according to the strip steel rolling speed, accordingly, the situation that the difference between the tail winding temperature and the front section winding temperature of the strip steel is too large due to steel throwing is avoided, and the cutting loss of the strip steel is decreased.