Abstract: As an incremental technology of fresh water resources，seawater desalination has become an important avenue dealing with the global water crisis.In recent years，seawater desalination by thermal method and membrane technology has employed world widely.However，the traditional methods of seawater desalination are still energy consumption and costly in operation.More attention has been paid to development and application of energy-saving and efficient seawater desalination technology.Development of compressed air energy storage technology（CAES），reverse osmosis seawater desalination technology in large depth（ROID），and integrated CAES and ROID seawater desalination technology were described.The design scheme of a large depth integrated CAES and ROID seawater desalination system was put forward.Energy consumption of the integrated CAES and ROID seawater desalination system and a traditional seawater desalination system were calculated，respectively.With same fresh water production，the energy consumption of the integrated CAES and ROID seawater desalination system accounted for only 20% of traditional seawater desalination system.