A fluid heat exchange assembly, comprising a fluid control module and a fluid heat exchange module, wherein: the fluid control module comprises a first connecting lateral portion, the fluid heat exchange module comprises a second connecting lateral portion, and the first connecting lateral portion and the second connecting lateral portion are oppositely and sealingly arranged; the fluid heat exchange module comprises a heat exchange core and a connecting component fixed by welding, the connecting component is provided with the second connecting lateral portion, the connecting component comprises a third connecting lateral portion, the heat exchange core comprises a fourth connecting lateral portion, and the third connecting lateral portion and the fourth connecting lateral portion are fixed by welding; the fluid control module comprises at least a first flow passage and a second flow passage, the first flow passage is able to be in communication with the second flow passage; and the fluid heat exchange module comprises a first fluid communication cavity, the second flow passage is in communication with the first fluid communication cavity, the connecting component comprises a connecting channel, the connecting channel runs through the connecting component, and the second flow passage and the first fluid communication cavity are connected by the connecting channel, characterised in that the fluid control module comprises a base member and a valve core member, the base member comprises a mounting cavity, at least a part of the valve core member is located in the mounting cavity, and the valve core member and the base member are sealingly fixed; the valve core member is rotatable with respect to the base member, communication between the second flow passage and the first flow passage is unblocked or blocked by the valve core member; the base member comprises a third flow passage, communication between the third flow passage and the first flow passage is unblocked or blocked by the valve core member; opening degrees of the second flow passage and the third flow passage are regulated through the valve core member; and the fluid heat exchange module comprises a first fluid first port arranged on the connecting component, the fluid control module comprises a first fluid first outlet in communication with the second flow passage, and the first fluid first outlet is in communication with the first fluid first port, the fluid heat exchange assembly comprises an isolating member, the isolating member is at least provided with a connecting orifice, and the connecting orifice is in communication with both the first fluid first port and the first fluid first outlet. the fluid control module comprises a first connecting lateral portion, the fluid heat exchange module comprises a second connecting lateral portion, and the first connecting lateral portion and the second connecting lateral portion are oppositely and sealingly arranged; the fluid heat exchange module comprises a heat exchange core and a connecting component fixed by welding, the connecting component is provided with the second connecting lateral portion, the connecting component comprises a third connecting lateral portion, the heat exchange core comprises a fourth connecting lateral portion, and the third connecting lateral portion and the fourth connecting lateral portion are fixed by welding; the fluid control module comprises at least a first flow passage and a second flow passage, the first flow passage is able to be in communication with the second flow passage; and the fluid heat exchange module comprises a first fluid communication cavity, the second flow passage is in communication with the first fluid communication cavity, the connecting component comprises a connecting channel, the connecting channel runs through the connecting component, and the second flow passage and the first fluid communication cavity are connected by the connecting channel, characterised in that the fluid control module comprises a base member and a valve core member, the base member comprises a mounting cavity, at least a part of the valve core member is located in the mounting cavity, and the valve core member and the base member are sealingly fixed; the valve core member is rotatable with respect to the base member, communication between the second flow passage and the first flow passage is unblocked or blocked by the valve core member; the base member comprises a third flow passage, communication between the third flow passage and the first flow passage is unblocked or blocked by the valve core member; opening degrees of the second flow passage and the third flow passage are regulated through the valve core member; and the fluid heat exchange module comprises a first fluid first port arranged on the connecting component, the fluid control module comprises a first fluid first outlet in communication with the second flow passage, and the first fluid first outlet is in communication with the first fluid first port, the fluid heat exchange assembly comprises an isolating member, the isolating member is at least provided with a connecting orifice, and the connecting orifice is in communication with both the first fluid first port and the first fluid first outlet.