Studying to the needs of electronic attack and defense in reality of weaponry, this paper focuses attention on the application of meta-materials for the field of electromagnetism, reviews briefly the evolution and practical application of electromagnetic meta-materials, and introduces the fields which have been most potentially disruptive technologies in recent years, i.e. intelligent cloaking technology and smart cloaking weapon systems. Basing a long-term research on electromagnetic cloaking & novel electromagnetic devices in combination with workings in industry, the paper analyzes the difficulties faced with a current meta-material cloaking technology to be further improved, and makes suggestions and outlooks for future development.