Abstract: In order to decrease the effect of laser-induced ultrasound on real-time performance and effectiveness of underwater remote sensing, the theory of laser-induced ultrasound and photoacoustic effect was analyzed. Character encoding was achieved by speech recognition technology. Baseband encoding for speech and code structure of controlling laser emission were discussed. The system of experimental measurement was set up. Pulse laser of 1.06μm wavelength was used to induce underwater ultrasound. By collecting and processing underwater laser-induced sound signals, real-time voice control from air platform in laboratory to underwater target could be accomplished. The experimental results show that, recognition and encoding for speaker-independent voice commands can realize the control of underwater target induced by laser ultrasound with adjustable baseband frequency. The study provides a new approach for underwater remote sensing with laser-induced ultrasound.