1. A pen type multimedia device, comprising: a body configured to have a pen form, wherein the body comprises a rollable display and a groove formed on one side of the body, a size of the groove corresponds to a size of the rollable display, and wherein the rollable display is configured to be unrolled outside of the body through the groove after being rolled inside the body; at least one or more cameras each configured to record a surrounding area of the body; an accelerometer sensor configured to sense a pattern of movement of the pen type multimedia device; and a controller configured to: acquire an image using the one or more cameras; convert the pattern sensed by the accelerometer sensor to a handwriting using the accelerometer sensor within an input time, wherein the input time is a predetermined time from a time the image is acquired; display the image on the rollable display; when the handwriting comprises a text, add the text to the image displayed on the rollable display; and when the handwriting comprises a geometrical shape and a text, perform a specific function within the pen type multimedia device corresponding to the handwriting for processing the image.