A processor of a general-purpose terminal acquires position information indicating whether a biological body is punctured from a first side of an ultrasonic probe apparatus or a second side opposite to the first side and angle information indicating a puncture angle, where these items of information are entered on a touch panel of a display, transmits these items of information to the probe apparatus via a wireless communication circuit, acquires, via the communication circuit, image information generated and transmitted by the probe apparatus based on reflected waves obtained by transmitting ultrasonic waves into the biological body from the probe apparatus at a first angle based on the above information, superimposes a puncture guide indicating a puncture path based on the above information on an ultrasonic image of the biological body or a puncture needle based on the image information, and displays a result of the superimposing on the display.
