A computer peripheral device containing contents and a method of outputting contents using the device are provided. The computer peripheral device containing contents includes: a memory in which contents and a program for driving the contents are previously stored, the memory outputting the contents and the content driving program in a content mode; an operation unit for performing a basic function of the computer peripheral device in a basic function mode; a controller setting the peripheral device to the content mode when a basic function of the peripheral device is initially performed on or after supply of power to execute the content driving program in a connected computer, and receiving a mode conversion signal generated on completion of the content driving program to switch from the content mode to the basic function mode for operation of the operation unit; and an interface for converting a signal output from the controller in a manner designated by the connected computer to output the converted signal. The computer peripheral device containing contents in accordance with the present invention can enhance the effect of contents such as advertisements etc. by outputting the contents when power is supplied to the computer to operate the peripheral device in the basic function mode or when no signal is input to the computer for more than a predetermined time.