Self-diagnosing system and method for connection status of devices, and non-transitory storage medium

A self-diagnosing method for connection status of devices, incorporated with a self-diagnosing system connected with multiple peripheral devices for communication in an environment, comprising:

• step a) determining, by the self-diagnosing system, whether receiving a device data of each of the peripheral devices;
• step b) identifying, by the self-diagnosing system, that a communication-line of a first device of the multiple peripheral devices is normal when the device data of the first device is received;
• step b1) after the step b), determining whether a connection status of the first device is a first category or a second category according to a target data relevant to connectivity of the first device, wherein the first category indicates that the communication-line of the first device and a device connection of the first device are normal and the second category indicates that the communication-line of the first device is normal but the device connection of the first device is abnormal;
• step c) identifying, by the self-diagnosing system, that a second device of the multiple peripheral devices is offline when the device data of the second device is not received;
• step c1) after the step c), determining whether the connection status of the second device is the second category or a third category through inspecting the communication-line of the second device, wherein the third category indicates that the communication-line of the second device and the device connection of the second device are abnormal;
• and
• step d) updating, by the self-diagnosing system, a displaying icon of each of the peripheral devices on a graphic control page of the self-diagnosing system based on the connection status of each of the peripheral devices.