Abstract: Steps for setting sprinkling of an automatic sprinkler includes step of pressing “RESET” button to clear the setting and operating “LEFT” and “RIGHT” shift buttons to set current date. The time is set by pressing “INCREASE” and “REDUCE” buttons the dates of period of sprinkling by pressing the “LEFT” and “RIGHT” shift buttons to set dates. Repeat the setting process for setting weekdays and weekend. When the pointer is shifted to positions of 2nd and 3rd, pressing the “RIGHT” button to remove the pointer. Press the “INCREASE” and “REDUCE” buttons to set the time of start and press the “ENTER” button when the pointer points at a first sprinkling position. Press the “INCREASE” and “REDUCE” buttons to set a period of time of sprinkling, and the pointer automatically pointing at “AUTO” position.