A method for providing contents corresponding to accessory devices and an electronic device thereof are disclosed. The electronic device includes a communication interface, at least one processor configured to be connected to the communication interface, and a memory connected to the at least one processor. The memory may store instructions that instruct the at least one processor to perform validity check on a first accessory device in response to detection of mounting of the first accessory device, determine a first content corresponding to the first accessory device, and provide a second content corresponding to a combination of the first accessory device and a second accessory device having an association relationship with the first accessory device, in response to detection of mounting of the second accessory device.