The invention discloses an instant noodles cake weight adjusting system and method, belongs to the technical field of production of instant noodles, and is designed to solve problems of poor adjusting effect and high labor intensity of the conventional method. The instant noodles cake weight adjusting system comprises a controller, a calender, a cut-off knife and a weighing unit, the weighing unit is connected with the controller, at least one of the calender and the cut-off knife is connected with the controller, and the weighing unit is used for weighing the weight of a cake and transmitting a weighing result to the controller. When the calender is connected with the controller, the controller can adjust the operation speed of pressing rollers of the calender and/or adjust the interval between two opposite pressing rollers of the calender if the difference between the weighing result and a standard weight of the instant noodles is greater than a preset value; and when the cut-off knife is connected with the controller, the controller can adjust the operation speed of the cut-off knife if the difference between the weighing result and the standard weight of the instant noodles is greater than the preset value. According to the system and method, the adjusting precision is high, the labor intensity is low, and the system and method can be applicable to promotion and application.