An electric vehicle, comprising: a power battery module detachably installed at a predetermined installation position of the electric vehicle, comprising: a housing; a plurality of battery cells arranged in the housing and connected with one another in a predetermined serial and/or parallel mode so as to output electric driving power required for the electric vehicle; rolling wheels, installed at the housing; and one or more electric power output ports, wherein at least one electric power output port is used for connection with an electric power input port of the electric vehicle to provide the electric driving power to the electric vehicle; and a lifting device installed at and carried by the electric vehicle, and configured to releasably hold the power battery module and lift the power battery module from a ground proximity position on or near the ground to the predetermined installation position; and the power battery module further comprises a handle installed at the housing which is configured, together with the rolling wheels, to facilitate a user dragging the power battery module on the ground in a state that the power battery module has been detached from the electric vehicle; the height of the ground proximity position is low enough for the user to push the power battery module to the ground proximity position via the rolling wheels without lifting the power battery module by manpower; characterized in that the lifting device comprises a holder for receiving and holding the power battery module; and the electric power input port of the electric vehicle comprises a receiving-end electric contact element formed at the holder; the electric power output port of the power battery module comprises an output-end electric contact element formed at the housing; and when the power battery module is moved into the ground proximity position, the power battery module is received and held by the holder, and the receiving-end electric contact element comes into electric contact with the output-end electric contact element. a power battery module detachably installed at a predetermined installation position of the electric vehicle, comprising: a housing; a plurality of battery cells arranged in the housing and connected with one another in a predetermined serial and/or parallel mode so as to output electric driving power required for the electric vehicle; rolling wheels, installed at the housing; and one or more electric power output ports, wherein at least one electric power output port is used for connection with an electric power input port of the electric vehicle to provide the electric driving power to the electric vehicle; and a housing; a plurality of battery cells arranged in the housing and connected with one another in a predetermined serial and/or parallel mode so as to output electric driving power required for the electric vehicle; rolling wheels, installed at the housing; and one or more electric power output ports, wherein at least one electric power output port is used for connection with an electric power input port of the electric vehicle to provide the electric driving power to the electric vehicle; and a lifting device installed at and carried by the electric vehicle, and configured to releasably hold the power battery module and lift the power battery module from a ground proximity position on or near the ground to the predetermined installation position; and the power battery module further comprises a handle installed at the housing which is configured, together with the rolling wheels, to facilitate a user dragging the power battery module on the ground in a state that the power battery module has been detached from the electric vehicle; the height of the ground proximity position is low enough for the user to push the power battery module to the ground proximity position via the rolling wheels without lifting the power battery module by manpower; characterized in that the lifting device comprises a holder for receiving and holding the power battery module; and the electric power input port of the electric vehicle comprises a receiving-end electric contact element formed at the holder; the electric power output port of the power battery module comprises an output-end electric contact element formed at the housing; and when the power battery module is moved into the ground proximity position, the power battery module is received and held by the holder, and the receiving-end electric contact element comes into electric contact with the output-end electric contact element. the power battery module further comprises a handle installed at the housing which is configured, together with the rolling wheels, to facilitate a user dragging the power battery module on the ground in a state that the power battery module has been detached from the electric vehicle; the height of the ground proximity position is low enough for the user to push the power battery module to the ground proximity position via the rolling wheels without lifting the power battery module by manpower; characterized in that the lifting device comprises a holder for receiving and holding the power battery module; and the electric power input port of the electric vehicle comprises a receiving-end electric contact element formed at the holder; the electric power output port of the power battery module comprises an output-end electric contact element formed at the housing; and when the power battery module is moved into the ground proximity position, the power battery module is received and held by the holder, and the receiving-end electric contact element comes into electric contact with the output-end electric contact element.