Ionic liquds are considered as an ideal alternative to volatile organic splvents and chemical industries in the future, because they are non-volatile. Ionic liquids are also considered as new novel chemical agents and widely regarded as a greener alternative to many commonly used solveds. Ionic liquids have been studied for a wide range of synthetic applications and have attracted considerable interest for use as electrolytes in the areas of organic sytheisis, catalysis, solar cell, fuel cells, electrodeposition ans supercapacitors, However, some ionic liquids suffer from more or less some drawbacks such as toxicity, preparation and high cost in the process for use. Most recently, three types of ionic liquids are attracted much attention specifically traditional ionic liqued, protic ionic liquid and deep eutectic, solvent, where their preparation, mechanism and limitation were