1. A method of managing sensor information in a portable terminal including a sub-controller, a sensor unit controlled by the sub-controller, and a main controller, the method comprising: collecting the sensor information through the sensor unit by the sub-controller; determining whether the main controller is in a sleep state; determining whether the collected sensor information is able to be stored in a sub-memory when the main controller is in the sleep state; storing the collected sensing information in the sub-memory when the collected sensor information is able to be stored in the sub-memory; and waking-up the main controller to move the collected sensor information and sensor information stored in the sub-memory to a main memory to store therein when the collected sensor information is unable to be stored in the sub-memory.