Electronic device and power back off control method thereof

According to various embodiments, the electronic device includes a first surface, the housing of the second face facing in a direction opposite to the first surface, and wherein the first surface and a part of the space between two surfaces, at least surround comprises a side surface; Or disposed in the interior of the housing, the first sensor and the second sensor is exposed through the at least one surface; Communication circuits disposed in the housing; Antenna radiator is electrically connected to the communication circuit; And the first and second sensors of the at least one sensor, and the communication circuit and a control circuit electrically connected to, and the control circuit, the external by using the antenna radiating a first signal output from the communication circuit to send and receive the device, using the first sensor, and at least a portion of the antenna radiator generating a second signal by detecting whether the external object close-up, using the second sensor, to detect the orientation of the electronic device to generate a third signal, at least in part on one of the second signal and the third signal is the occurrence, it can be configured to reduce the intensity of the first signal.