The mobile terminal for inserting watermarking data into image data and the method thereof are disclosed. The mobile terminal includes a first storage for storing watermark data of an image; a camera module for obtaining an image and converting the image into an analog electric image data; an image data encoder for encoding the analog electric image data into digital image data and inserting the watermark data stored in the first memory into the digital image data; a second storage for storing the encoded image data having the watermark data of the image; and a controller for controlling the image data encoder to encode the image data obtained through the camera module with inserting the watermark data of the image data stored in the first storage.