Ultrasonic diagnostic devices and methods for supporting synchronous scanning are provided in this disclosure. The ultrasonic diagnostic device can include a display module, an imaging system and multiple probes. The multiple probes are capable of being attached to different positions on a body surface of a patient, such that synchronous and real-time scanning can be performed by the multiple probes for body parts corresponding to those different positions on the patient's body surface. Echo signals can be obtained by the multiple probes through scanning, and may then be transmitted to the imaging system. The imaging system can convert the multiple echo signals transmitted from the multiple probes into multiple ultrasonic images. The display module may be coupled to the imaging system. It can receive the multiple ultrasonic images processed and outputted by the imaging system, and display these images synchronously.
