This study aims to show a trick to display the uniqueness of a steady program implied in irrigation telecontrol. The instrument comprises master terminal unit (MTU, master) and remote terminal unit (RTU). The MTU can exhibit the uniqueness of each instrument by inputting the RTU number. Then the program enters an array definition. The array definition makes every RTU seems unique and distinct from the others from the aspects of 1) MTU sim card number, 2) RTU sim card number, 3) background image, 4) farmer group, 5) farmer coordinator, 6) farming area name, and 7) display colour.