A compressed air turbine DC power generator system, comprising: an aerodynamic turbine engine; a direct current generator configured to generate a direct current by using power output of the aerodynamic turbine engine as a driving input; and a control unit configured to control a rotating speed of the aerodynamic turbine engine to generate the power output and adjust an output current and/or an output voltage of the direct current generator, wherein the aerodynamic turbine engine comprises a turbine chamber, a turbine, a power output shaft, an air intake adjusting valve, an inlet port, and an exhaust port, each of the inlet port and the exhaust port is connected to the turbine chamber, the air intake adjusting valve is provided at the inlet port, the turbine is provided in the turbine chamber, the turbine is connected to the power output shaft, the compressed air turbine DC power generator system is characterized in that, the control unit is further configured to: receive a power generation activation command from a CAN bus, wherein the power generation activation command is configured to instruct the control unit to control the air intake adjusting valve to open or close, and determine whether a rotating speed of the turbine has reached a target value, wherein in a case that the rotating speed of the turbine cannot reach the target value, if the air intake pressure cannot meet a required level when the air intake adjusting valve has been opened to the maximum, the control unit is further configured to determine a generation mode of the system as a power-reduced generation mode, and if the rotating speed of the turbine reaches the target value, the control unit is further configured to determine the generation mode of the system as a current-constant generation mode, a voltage-constant generation mode or a power-constant generation mode according to a CAN command. an aerodynamic turbine engine; a direct current generator configured to generate a direct current by using power output of the aerodynamic turbine engine as a driving input; and a control unit configured to control a rotating speed of the aerodynamic turbine engine to generate the power output and adjust an output current and/or an output voltage of the direct current generator, wherein the aerodynamic turbine engine comprises a turbine chamber, a turbine, a power output shaft, an air intake adjusting valve, an inlet port, and an exhaust port, each of the inlet port and the exhaust port is connected to the turbine chamber, the air intake adjusting valve is provided at the inlet port, the turbine is provided in the turbine chamber, the turbine is connected to the power output shaft, the compressed air turbine DC power generator system is characterized in that, the control unit is further configured to: receive a power generation activation command from a CAN bus, wherein the power generation activation command is configured to instruct the control unit to control the air intake adjusting valve to open or close, and determine whether a rotating speed of the turbine has reached a target value, wherein in a case that the rotating speed of the turbine cannot reach the target value, if the air intake pressure cannot meet a required level when the air intake adjusting valve has been opened to the maximum, the control unit is further configured to determine a generation mode of the system as a power-reduced generation mode, and if the rotating speed of the turbine reaches the target value, the control unit is further configured to determine the generation mode of the system as a current-constant generation mode, a voltage-constant generation mode or a power-constant generation mode according to a CAN command. receive a power generation activation command from a CAN bus, wherein the power generation activation command is configured to instruct the control unit to control the air intake adjusting valve to open or close, and determine whether a rotating speed of the turbine has reached a target value, wherein in a case that the rotating speed of the turbine cannot reach the target value, if the air intake pressure cannot meet a required level when the air intake adjusting valve has been opened to the maximum, the control unit is further configured to determine a generation mode of the system as a power-reduced generation mode, and if the rotating speed of the turbine reaches the target value, the control unit is further configured to determine the generation mode of the system as a current-constant generation mode, a voltage-constant generation mode or a power-constant generation mode according to a CAN command. in a case that the rotating speed of the turbine cannot reach the target value, if the air intake pressure cannot meet a required level when the air intake adjusting valve has been opened to the maximum, the control unit is further configured to determine a generation mode of the system as a power-reduced generation mode, and if the rotating speed of the turbine reaches the target value, the control unit is further configured to determine the generation mode of the system as a current-constant generation mode, a voltage-constant generation mode or a power-constant generation mode according to a CAN command.