An ultrasound system in which a mobile information terminal is connected to an ultrasound probe and a head-mounted display having a head-mounted display-side display unit, wherein the head-mounted display includes a view camera unit that generates a view image obtained by imaging a field of view in front of a user, the ultrasound probe includes a transducer array, a transmission and reception unit that transmits an ultrasonic wave from the transducer array and generates a sound ray signal based on a reception signal acquired by the transducer array, an image information data generation unit that generates image information data based on the sound ray signal generated by the transmission and reception unit, and a probe-side wireless communication unit that transmits the image information data to the mobile information terminal in a wireless manner, the mobile information terminal includes a mobile information terminal-side display unit, an input unit that includes a touch sensor disposed to be superimposed on the mobile information terminal-side display unit and is used by the user to perform an input operation, an operation image generation unit that generates an operation image that is displayed on the mobile information terminal-side display unit and is used by the user to perform the input operation through the touch sensor, a view image analysis unit that detects a screen of the mobile information terminal-side display unit shown in the view image generated by the view camera unit by performing image analysis on the view image, a head-mounted display data generation unit that generates head-mounted display data, having a display format for the head-mounted display-side display unit based on the image information data transmitted from the ultrasound probe in a wireless manner, and including data corresponding to a head-mounted display ultrasound image and the screen of the mobile information terminal-side display unit detected by the view image analysis unit, and a terminal-side wireless communication unit that transmits the head-mounted display data generated by the head-mounted display data generation unit to the head-mounted display in a wireless manner, and the head-mounted display displays the head-mounted display ultrasound image and the screen of the mobile information terminal-side display unit on the head-mounted display-side display unit based on the head-mounted display data transmitted from the mobile information terminal in a wireless manner. wherein the head-mounted display includes a view camera unit that generates a view image obtained by imaging a field of view in front of a user, the ultrasound probe includes a transducer array, a transmission and reception unit that transmits an ultrasonic wave from the transducer array and generates a sound ray signal based on a reception signal acquired by the transducer array, an image information data generation unit that generates image information data based on the sound ray signal generated by the transmission and reception unit, and a probe-side wireless communication unit that transmits the image information data to the mobile information terminal in a wireless manner, the mobile information terminal includes a mobile information terminal-side display unit, an input unit that includes a touch sensor disposed to be superimposed on the mobile information terminal-side display unit and is used by the user to perform an input operation, an operation image generation unit that generates an operation image that is displayed on the mobile information terminal-side display unit and is used by the user to perform the input operation through the touch sensor, a view image analysis unit that detects a screen of the mobile information terminal-side display unit shown in the view image generated by the view camera unit by performing image analysis on the view image, a head-mounted display data generation unit that generates head-mounted display data, having a display format for the head-mounted display-side display unit based on the image information data transmitted from the ultrasound probe in a wireless manner, and including data corresponding to a head-mounted display ultrasound image and the screen of the mobile information terminal-side display unit detected by the view image analysis unit, and a terminal-side wireless communication unit that transmits the head-mounted display data generated by the head-mounted display data generation unit to the head-mounted display in a wireless manner, and the head-mounted display displays the head-mounted display ultrasound image and the screen of the mobile information terminal-side display unit on the head-mounted display-side display unit based on the head-mounted display data transmitted from the mobile information terminal in a wireless manner.