The invention provides a temperature control and preparation integrated machine for acidic milk. The temperature control and preparation integrated machine comprises a container module, an electric stirring module, a control module, an electric heating module, a refrigerating module, a heating and refrigerating switching pipeline module, an external thermal insulation module and a support module; the container module comprises a tank, the tank comprises an inner tank body, an outer tank body, a movable cover plate, a fixed cover plate, pin shafts, a cover plate handle and a cover plate support frame, the electric stirring module comprises a stirring motor, a motor support frame and a stirring paddle, the control module comprises an electrical control box, an electric heater is adopted as the electric heating module, the refrigerating module comprises a refrigerating compressor, a refrigerating condenser, a refrigerating evaporator and a circulating water exchanging container, and the heating and refrigerating switching pipeline module comprises multiple stop valves, a communication pipeline, a circulating water pump and a built-in circulating water pipeline. According to the integrated machine, mechanical operation of temperature control and preparation of the acidic milk can be achieved, temperature control and stirring process control in the acidic milk preparation process are achieved, and therefore the production and preparation process of the acidic milk is more efficient and more controllable.