Assessment of equipment support characteristics is an important supervisory method for evaluating supportability targets .condition monitoring is an important means for acquiring and mastering equipment status in time and supporting the evaluation of support characteristics .Condition monitoring and support characteristic evaluation can monitor and evaluate equipment running status in real time or periodically ,predict equipment decline trend and optimal maintenance time .Based on the condition monitoring ,this paper studies the condition monitoring and evaluation system of coastal defense equipment ,designs the condition monitoring ,health management and evaluation system ,and supports the research and verification of coastal defense equipment support characteristic evaluation technology.the validity of the system is verified by a certain army coastal defense equipment .the state of the coastal defense equipment of the visiting team is mastered ,and the timely and accurate evaluation and judgment of the support characteristics provide effective support .