The invention relates to the technical field of temperature adjusting heating equipment, in particular to a temperature adjusting system of a nursery garden greenhouse. The temperature adjusting system comprises a heat pump system, wherein the heat pump system comprises an evaporator, a compressor, a condenser and a throttling device; an air channel of a built-in draught fan is arranged in the nursery garden greenhouse, so that air flow in the nursery garden greenhouse is enabled to circulate; a heat transferring medium circulates in a circulation loop formed by sequential connection of the evaporator, the compressor, the condenser and the throttling device, and air is utilized as an energy source for heating or cooling the air flow passing through the air channel. The air source heat pumpsystem is adopted for heating a nursery garden, the temperature in the nursery garden greenhouse at night or in winter is kept in an appropriate temperature range suitable for nursery garden growth,no toxic gas is produced, and the system is safe and environmentally friendly, has high energy efficiency and can save heating cost.