A computer device, characterized by comprising: a universal serial bus connector connectable to an external USB device, wherein the USB connector is configured to provide a quick charging mode or a general charging mode for charging the external USB device; wherein the USB connector is configured to operate in the general charging mode as the beginning default state; a power off unit connected to the USB connector; a reading unit; a south bridge chip; a first switching unit connected to the USB connector, wherein the first switching unit is configured to switch between the south bridge chip and the reading unit, wherein the reading unit is configured to read internal information of the external USB device; a control unit connected to the power off unit, the first switching unit, the south bridge chip and the reading unit, respectively, wherein the control unit is configured to transmit a control signal; and a charging control unit connected to the control unit and configured to transmit a quick charging command or a general charging command; wherein the control unit is configured to control the first switching unit; the power off unit is configured to send a power off command to the USB connector upon the receipt of a control signal from a control unit; the control unit is configured to send a control signal to the power off unit, to set a power off time of the USB connector upon the receipt of a quick charging command and to control the first switching unit to switch from the south bridge chip to the reading unit; wherein the USB connector is configured to switch from the original general charge mode to the quick charging mode after reconnection; the control unit is configured to send a control signal to the power off unit, to set a power off time of the USB connector upon the receipt of a general charging command and control the first switching unit to switch from the reading unit to the south bridge chip; and the USB connector is configured to switch from the quick charging mode to the original general charge mode after reconnection; wherein the quick charging mode can be selected via a user interface of software in the computer device while the USB connector remains connected to the external USB device. a universal serial bus connector connectable to an external USB device, wherein the USB connector is configured to provide a quick charging mode or a general charging mode for charging the external USB device; wherein the USB connector is configured to operate in the general charging mode as the beginning default state; a power off unit connected to the USB connector; a reading unit; a south bridge chip; a first switching unit connected to the USB connector, wherein the first switching unit is configured to switch between the south bridge chip and the reading unit, wherein the reading unit is configured to read internal information of the external USB device; a control unit connected to the power off unit, the first switching unit, the south bridge chip and the reading unit, respectively, wherein the control unit is configured to transmit a control signal; and a charging control unit connected to the control unit and configured to transmit a quick charging command or a general charging command; wherein the control unit is configured to control the first switching unit; the power off unit is configured to send a power off command to the USB connector upon the receipt of a control signal from a control unit; the control unit is configured to send a control signal to the power off unit, to set a power off time of the USB connector upon the receipt of a quick charging command and to control the first switching unit to switch from the south bridge chip to the reading unit; wherein the USB connector is configured to switch from the original general charge mode to the quick charging mode after reconnection; the control unit is configured to send a control signal to the power off unit, to set a power off time of the USB connector upon the receipt of a general charging command and control the first switching unit to switch from the reading unit to the south bridge chip; and the USB connector is configured to switch from the quick charging mode to the original general charge mode after reconnection; wherein the quick charging mode can be selected via a user interface of software in the computer device while the USB connector remains connected to the external USB device.