An intravascular imaging system and method, the intravascular imaging system comprising a laser light source (1), a coupling light path (2), a signal collection and control system (3), a time-delay circuit (4), an ultrasonic signal transceiver (5), a three-dimensional scanning system (6) and an opto-acoustic/ultrasonic vascular endoscope device (7) the pulse laser (31) emitted by the laser light source (1) sequentially passes through the coupling light path (2), the three-dimensional scanning system (6) and the opto-acoustic/ultrasonic vascular endoscope device (7), and obliquely enters a vascular wall to excite an opto-acoustic signal a synchronous triggering signal emitted by the laser light source (1) enters the ultrasonic signal transceiver (5) the ultrasonic signal transceiver (5) controls, according to the synchronous triggering signal, the opto-acoustic/ultrasonic vascular endoscope device (7) to transmit and receive an ultrasonic wave signal and the signal collection and control system (3) receives the opto-acoustic signal and the ultrasonic wave signal from the opto-acoustic/ultrasonic vascular endoscope device (7) via the ultrasonic signal transceiver (5), conducts three-dimensional reconstruction according to the opto-acoustic signal and the ultrasonic wave signal, and generates a three-dimensional image and a cross section image of an intravascular tissue. The intravascular imaging system improves an imaging speed.La présente invention concerne un système et un procédé dimagerie intravasculaire, ledit système dimagerie intravasculaire comprenant une source de lumière laser (1), un trajet de couplage (2) de lumière, un système (3) de collecte et de commande de signaux, un circuit de temporisation (4), un émetteur-récepteur (5) de signaux ultrasonores, un système (6) de balayage tridimensionnel et un dispositif (7) dendoscope vasculaire opto-acoustique/ultrasonore le laser (31) à impulsions émis par la source de lumière laser (1) passe séquentiellement pa
