Provided is a thermostatic valve including a first valve body, a second valve body, a third valve body, a first thermal actuator, a second thermal actuator, a valve core, a first valve port, a second valve port and a third valve port. The first valve body includes a second cavity and a third cavity. The second thermal actuator is sealedly fixed in the first valve body to isolate the second cavity from the third cavity. At least a part of the valve core is located in the second cavity. The valve core is connected to, or is integrated with, or abuts against a second valve stem of the second thermal actuator. The second thermal actuator is configured to act in response to a change in temperature of a fluid in the third cavity. The valve core is configured to open the second valve port or the third valve port in response to an action of the second valve stem.