An external memory power control apparatus and method capable of controlling power of an external memory inserted into a mobile terminal. The external memory power control apparatus includes an external memory power switch for switching between a power supply and an external memory to supply or block power for the external memory; and a controller, when ‘power-on’ is selected on the mobile terminal, for checking and notifying operability of the external memory inserted into the mobile terminal after completing booting while the external memory power switch turned off, wherein the controller may selectively turn on/off the external memory power switch depending on operability of the external memory.