Echocardiography is an important tool in investigation, re-evaluation of remained postoperative defect and follow-up for adult congenital heart disease, even though there are often a problem to obtain optimal echocardiogram. The usual systematic echocardiographic assessments should include special focus on 1) anatomic description of situs, concordance, discordance or valves; 2) chamber sizes and function; 3) valve appearance and function; 4) shunts; 5) pulmonary artery pressure; 6) flow and size of the arch; and 7) drainage of pulmonic veins. The major lesions are presented and echocardiographic features briefly discussed.