A semiconductor system may include a memory device and a controller. The memory device may include a plurality of decks. Each of the decks may include word lines and bit lines alternately stacked. The controller may control an operation for data of the decks included in the memory device. The controller may include a counting circuit block for counting access numbers of the word lines and the bit lines. The counting circuit block may include a plurality of x-counting blocks corresponding to the word lines that are stacked a plurality of y-counting blocks corresponding to the bit lines that are stacked. The x-counting blocks may count access numbers of selected word lines in accordance with a selection signal of a corresponding deck among the decks. The y-counting block may count access numbers of selected bit lines in accordance with the selection signal of the corresponding deck.