The invention relates to a kitchen inventory management system and method. The system comprises a first image acquisition device used for acquiring a first image and determining a first registration image set composed of the position of an operator in a warehouse and registration images of food stored in all inventory positions which can be touched by the operator at corresponding positions basedon the first image by the system; a second image acquisition device used for detecting a second image of the hand of the operator; and/or a third image acquisition device for detecting a third image of the hand of the operator. When an operator gets food, the operator can take the food, a computing device determines a type of food held by an operator based on a comparison of the second image, thethird image, and the first set of registered images, and a first matching condition of the food taking information associated with the operator is judged according to the type of the food held by theoperator, and the inventory state of the corresponding inventory position is updated according to the state of the food held by the operator when the first matching condition is passed.