The invention relates to the technical field of fuel gas odorizing and provides a fuel gas odorizing control device. The fuel gas odorizing control device comprises a control unit, a first detection unit and an execution mechanism, wherein the execution mechanism and the first detection unit are both in data communicating connection with the control unit, and the flowing direction of fuel gas in a pipeline is from a first measurement position to an odorizing agent inputting device. The first detection unit is arranged at the first measurement position and is used for measuring a first measurement parameter of the fuel gas at the first measurement position. The control unit receives the first measurement parameter and controls the execution mechanism to input an odorizing agent according to the first measurement parameter. Therefore, the odorizing amount can be accurately controlled, the filling concentration can be corrected in real time, and pipeline fuel gas can be quickly, conveniently and effectively odorized. The invention further provides a fuel gas odorizing system. The fuel gas odorizing system comprises a power device, a delivery device and the fuel gas odorizing control device. The power device and the delivery device are respectively connected with the fuel gas odorizing control device, timely and accurate filling is achieved, and raw materials and energy sources are saved.