Nowadays environmental issues due to emission of greenhouse gases such as CO2 are discussed. CO2 capture has also been introduced. Large amount of CO2 is discharged from Chinese coal fired electric power generation, so CO2 capture is mainly studied in order to protect the environment. Four types of CO2 capture technologies such as decarbonation before burning, CO2 capture after burning, oxygen-rich technologies and chemical looping combustion have been discussed. CO2 capture is improved by using the above methods. The complete development of CO2 capture technologies has resulted in good economic and social benefits around the world