An automatic portable detection system for pathogenic bacteria includes
a water inlet and outlet device, a miniature mixing device, and a detection chip. Through a micro-pump, sample water and multiple reagents are sequentially injected into the microchip for mixing, generating an analyte solution and initiating a color reaction. The detection chip is responsible for detecting the color depth of the analyte solution, converting it into a corresponding voltage value, and generating a test result upon completion of the color reaction.