An electronic device and a booting method thereof are provided, wherein the method includes the steps of copying the boot image from the first non-volatile memory to the internal RAM when a booting operation of the electronic device begins, setting a stack pointer in the internal RAM by executing a control code to set the stack pointer among control codes of the boot image, and activating the main memory by executing a control code to initialize the main memory controller and activate the main memory among the control codes of the boot image, the control code to initialize the main memory controller and activate the main memory using the stack pointer. Accordingly, since the control code to initialize the main memory controller to activate the main memory is written in a high-level programming language instead of assembly language, the display device can be driven before the main memory is activated.