At present,the underwater visual installation of accropode block is mainly carried out by underwater camera or sonar imaging method,which requires high visibility of the underwater environment or high cost of the sensor,and it is difficult to achieve quantitative control of key parameters.Based on the analysis of the construction process and acceptance requirements of the accropode block,the intelligent guidance system for the installation of the accropode block is developed by installing sensors on the objects such as the crawler crane and the accropode block and building the calculation program of spatial points.The verification work is carried out on site by the typical section in the breakwater construction field,and the visual installation of accropode block in the whole section of the breakwater is realized.The system permits the installation work of the accropode block in the high water level condition,increases the construction period and improves the efficiency of construction work.