With the development of information technology and the improvement of ultrasonic instrument performance, portable and intelligent ultrasonic equipment has played an important role in many clinical fields. Remote technology has made the ultrasonic diagnosis and treatment free from the restriction of location, and the applied field has been expanded. In this review, we summarized the application status of portable remote ultrasound in clinical disease diagnosis, emergency rescue, perioperative assistance, military medical support, and student teaching, which fully reflected its unique advantage of “small size and multiple functions”. Based on the characteristics of high speed and low delay of 5G technology, its expanded application was also prospected.