The submarine cable inspection robot was designed as an openframe remotely underwater vehicle for inspection and maintenance of submarine cable corrosion, damage and other problems for submarine cables. With considering the actual application requirements of submarine robot for cable inspection, four degrees of freedom (4DOF) motion modelling for remotely underwater vehicle of submarine robot was introduced. The hardware architecture components of submarine robot of cable inspection remotely underwater vehicle were discussed in detail. The software architecture system of robot was designed by using a modular approach based on the different function and implementation.