Air-cooled unit: (1) Additional heat load diagnosis: Such as shaft seal steam, Drain emergency relief valve leakage, vacuum leakage; (2) Temperature monitoring and control of air-cooled island: Dynamic monitoring, automatic control of air-cooled fans,and automatic flushing and spraying; (3) "Load"-Vacuum dynamic model:  Self-tuning for differential diagnosis, pushing optimized operation and maintenance strategies; (4) "Micro-power Enhancement Comprehensive Knowledge Base: Establish an expertknowledge base for vacuum system performance and optimization; (5) Seasonal safety warning: Evaluation of fan energy consumption level, temperature distribution and anti-freezing early warning; (6) Result: Push the optimization strategy with most economicvacuum and air cooled power consumption.