the setting temperature of air conditioner stipulated by the state: it shall not be lower than 26℃ in summer; It shall not be higher than 21℃ in winter.

in summer, the air conditioner can only work when the set temperature is lower than the indoor temperature.

in winter, the air conditioner can only work when the set temperature is higher than the indoor temperature.

Therefore, according to the national regulations, when the indoor temperature is higher than 26 degrees Celsius in summer, the air conditioner can be turned on for refrigeration. In winter, when the indoor temperature is below 21 degrees Celsius, you can turn on the air conditioner for heating.

On June 1, 2117, the General Office of the State Council issued a notice requesting strict implementation of the air conditioning temperature control standard for public buildings. The notice requires that all units in public buildings, including state organs, social organizations, enterprises, institutions and individual industrial and commercial households, except special units such as hospitals and approved users who have specific requirements on temperature in production technology, the indoor air conditioning temperature setting should not be lower than 26 degrees Celsius in summer and not higher than 21 degrees Celsius in winter. Under normal circumstances, it is forbidden to open windows during air conditioning operation.