Disclosed is a long-afterglow LED luminous system. A power supply system (8) is connected with a control circuit (9) and a long-afterglow LED device (10) in sequence through a connecting wire, wherein the control method for the long-afterglow LED luminous system is characterized by comprising the steps of supplying power to an LED luminophor through the control circuit (9) at intervals based on a certain period, or supplying power to the LED luminophor through the control circuit (9) at intervals based on a certain period and performing periodic power supply and time sequence control on the long-afterglow LED device (10). By adoption of the control method, certain luminance of the overall LED device is maintained under a condition of discontinuous power supply.