The invention discloses a control method and system for a push-button shifter. The method comprises the steps that whether a button signal of a gear is receivedor not is judged, and if yes, whether button signals of other gears are simultaneously received within a preset time period or not is judged; if the button signals of the other gears are simultaneously received within the first preset timeperiod, the button states of the gear and the other gears are transmitted, and buttons of the gear and the other gears are set at the LOCK positions; and if the button signals of the other gears are simultaneously received after a first preset time period, button states are transmitted according to the time axis of the received button signals of the gear and the other gears, and the buttons of thegear and the other gears are set at the LOCK positions in the corresponding time period. A mechanical shifter is replaced with the push-button shifter, a more flexible and safe shifting mode is achieved, and the LOCK buttons are used flexibly for effectively solving the problem such as button faults.