Depression is a prevalent disorder that impairs psychosocial functioning and lowers the quality of life. Low mood, loss of energy, sleeplessness, and an inability to enjoy life are depression’s significant symptoms. World Health Organization ranked unipolar depressive disorder as the third cause of disease burden in 2004 and expected it to be the leading cause by 2030. For this disease, a low diagnosis rate is a big problem, partially because of the current technology’s limitations, such as clinical-based, trigger-less, costly. So, our project comes up with a novel idea by using flash stimulus and GSR sensor to test people’s physiological reactions towards different triggers for self-prevention and preliminary diagnosis use.