To prevent memory cells from being damaged, the present invention provides a data storage method for an electronic device, which comprises dividing a first section of a memory of the electronic device into N blocks, wherein each of the N blocks is corresponding to a sequence number and assigned an index value; rewriting an assigned index value corresponding to an nth block of the N blocks according to index values corresponding to the N blocks; storing an input data in the nth block; and rewriting the nth block by stored data in the (n−1)th block before storing the input data in the nth block when the index values corresponding to the N blocks are not identical such that a number of times of accessing sections of the memory is averaged, to prevent the memory from being damaged; wherein N is an integer greater than or equal to 1, and 1≦n≦N.