In a sense, quantum teleportation by which information could only be transferred in one-way is not a perfect mode of communication. Thus, a scheme of two-way quantum communication controlled by a third party is proposed. Firstly, both sides of communication need accomplish information encoding through some unitary transformations. Then they should perform Bell-state measurements(BSMs) to their own qubits respectively, and announce the measured results. With the permission of the controller, two sides of communication could realize the quantum dialogue without divulging information to controller. Because of the join of a third party, safety of quantum dialogue is greatly enhanced, which makes this scheme better. According to the realization of secure two-way quantum communication, the scheme may be a good reference in practical application of quantum secure dialogue and quantum private communication.