Provided is a control system using an in-vehicle gesture input, and more particularly, a system for receiving a vehicle occupant's gesture and controlling the execution of vehicle functions. The control system using an in-vehicle gesture input includes an input unit configured to receive a user's gesture, a memory configured to store a control program using an in-vehicle gesture input therein, and a processor configured to execute the control program. The processor performs an information display control for areas layered in a windshield screen according to the user's gesture.