An exemplary ultrasonic diagnostic system includes a portable ultrasonic diagnostic apparatus and a cloud computing system. The portable ultrasonic diagnostic apparatus includes an ultrasonic sensing unit, a front-end circuit, a data compression unit and a communication unit. The ultrasonic sensing unit is configured to sense a signal reflected from a measured object. The front-end circuit is configured to perform a pre-processing on an output of the ultrasonic sensing unit. The data compression unit is configured to receive an output of the front-end circuit and determine whether to perform a data compression process on the output of the front-end circuit according to a selected result. The communication unit is configured to receive an output of the data compression unit and further transmit the output of the data compression unit to the cloud computing system.
