A hybrid system, comprising: a transmission, wherein the transmission comprises a first input shaft, a second input shaft, an output shaft and an intermediate shaft, the second input shaft sleeves the first input shaft and the second input shaft and the first input shaft are capable of rotating independently of each other, the first input shaft is provided with a first synchromesh mechanism, the output shaft is provided with a second synchromesh mechanism, a first input shaft first gear which is arranged on the first input shaft in a non-torque-resistant manner and corresponds to the first synchromesh mechanism is always in a meshing state with an intermediate shaft first gear which is arranged on the intermediate shaft in a torque-resistant manner, a first input shaft second gear which is arranged on the first input shaft in a non-torque-resistant manner and corresponds to the first synchromesh mechanism is always in a meshing state with an output shaft first gear which is arranged on the output shaft in a torque-resistant manner, an output shaft second gear and an output shaft third gear which are arranged on the output shaft in a non-torque-resistant manner and correspond to the second synchromesh mechanism are always in a meshing state, respectively with a second input shaft first gear and a second input shaft second gear which are arranged on the second input shaft in a torque-resistant manner, and the intermediate shaft is also provided with an intermediate shaft second gear in a torque-resistant manner, and the intermediate shaft second gear is always in a meshing state with the second input shaft second gear; an electric motor, wherein the electric motor is always in transmission connection with the second input shaft; and an engine and a dual clutch, wherein the dual clutch comprises a first clutch unit and a second clutch unit, the engine is connected to the first input shaft and the output shaft via the dual clutch, so that when the first clutch unit is engaged/disengaged, the engine and the first input shaft implement transmission connection/end transmission connection, and when the second clutch unit is engaged/disengaged, the engine and the second input shaft implement transmission connection/end transmission connection. a transmission, wherein the transmission comprises a first input shaft, a second input shaft, an output shaft and an intermediate shaft, the second input shaft sleeves the first input shaft and the second input shaft and the first input shaft are capable of rotating independently of each other, the first input shaft is provided with a first synchromesh mechanism, the output shaft is provided with a second synchromesh mechanism, a first input shaft first gear which is arranged on the first input shaft in a non-torque-resistant manner and corresponds to the first synchromesh mechanism is always in a meshing state with an intermediate shaft first gear which is arranged on the intermediate shaft in a torque-resistant manner, a first input shaft second gear which is arranged on the first input shaft in a non-torque-resistant manner and corresponds to the first synchromesh mechanism is always in a meshing state with an output shaft first gear which is arranged on the output shaft in a torque-resistant manner, an output shaft second gear and an output shaft third gear which are arranged on the output shaft in a non-torque-resistant manner and correspond to the second synchromesh mechanism are always in a meshing state, respectively with a second input shaft first gear and a second input shaft second gear which are arranged on the second input shaft in a torque-resistant manner, and the intermediate shaft is also provided with an intermediate shaft second gear in a torque-resistant manner, and the intermediate shaft second gear is always in a meshing state with the second input shaft second gear; an electric motor, wherein the electric motor is always in transmission connection with the second input shaft; and an engine and a dual clutch, wherein the dual clutch comprises a first clutch unit and a second clutch unit, the engine is connected to the first input shaft and the output shaft via the dual clutch, so that when the first clutch unit is engaged/disengaged, the engine and the first input shaft implement transmission connection/end transmission connection, and when the second clutch unit is engaged/disengaged, the engine and the second input shaft implement transmission connection/end transmission connection.