Abstract: A cold and hot blender has a body, a pulp container, a cup lid, a blade group and a motor; a boiler generating the steam is arranged in the body; steam outlet of boiler is communicated with pulp container; a boiler switch is arranged on the body. The food material in the pulp container is processed into cold juice when the motor is started. The food material in the pulp container is processed into hot drink by the rotary blade group and steam generated by the boiler when the motor and the boiler are started. The food material in the pulp container is steamed or boiled by steam when only the boiler is started. The boiler is started and the food material in the pulp container is steamed. Then the food material is processed into hot puree when the boiler stops and the motor is started.