Microbial detector is an experimental instrument used in chemistry and biology teaching, usually including a culture medium preparation device, a microbial detection room, and a data analysis system. In chemistry teaching, students can use microbial detectors to observe the growth of microorganisms under different conditions, such as temperature, pH value, nutrients, etc., and their effects on microbial growth. In addition, it can also be used to detect the microbial content in water and soil samples, as well as evaluate the bactericidal effect of disinfectants. The use of microbial detection equipment can not only enhance students' understanding of basic microbiology knowledge, but also cultivate their experimental operation skills and scientific exploration abilities.