Food flora tracking detection method and food expiration time reminding method

The invention discloses a food flora tracking detection method and a food expiration time reminding method, and relates to the technical field of food safety detection. The method comprises the following steps: collecting environment temperatures and placing days of a plurality of eaters for storing and eating for multiple times to obtain representative environment temperatures and representative placing days; according to the pH value distribution range of the food in the edible state and the pH values of the food in the multiple representative environment temperature states after the food is placed for different representative days, the remaining edible days corresponding to the multiple representative pH values of the food in the multiple representative environment temperature states are obtained; detecting and acquiring the pH value of the food at the current moment; acquiring the environment temperature at the current moment; and substituting the pH value of the food at the current moment and the environ