The construction of monitoring and control network of offshore artificial island can be established by means of offshore measurement platform.We carry out a special study on the problem that the measuring platform of offshore rigid structure is susceptible to external factors such as temperature,humidity,pressure,wind force,tide and so on,which has a great influence on the precision of the monitoring and control network.Based on the monitoring project of west artificial island project of Shenzhen-Zhongshan Bridge,we propose a transference method of height difference through reasonable controlling technical indexes,verify the feasibility of the method by the analysis of precision,realize the establishment of construction monitoring and control network which meets second-class technical requirements,and give several measures to improve the precision.It can provide references for the construction monitoring of offshore artificial island.