A mobile device using an e-paper display panel and a method for controlling the same are disclosed, in which the mobile device is switched to a standby mode and a lock mode. The mobile device includes an e-paper display unit configured to display contents; an input signal receiving unit configured to detect an input signal and transmit the detected input signal to a processor; and the processor configured to control the e-paper display unit and the input signal receiving unit, wherein the processor is further configured to switch the mobile device to a first standby mode if a lack of a touch input signal is detected for a predetermined time, wherein the first standby mode is a mode displaying a first image on the e-paper display unit and disabling detecting of a touch input signal for the displayed first image.