Abstract: This paper is a lecture notes spoken by profesor Tian to the national advancedworkshop of modern electrochemistry.The developments of fundamental studies of modernelectrochemistry are reviewed.outline of this subject as follows. 1. Importance of science and technology in electrochemistry 1.1 Electrochemical phenomena exist every where in nature1.2 Extensive applications of electrochemical technology 2.Electroch6mical systems and researches 2.1Characteristics 2.2Advantages 2.3Difficulties3.Advance the modern electrochemical fundamental study at atomic-molecular level3.l Comparisons between traditional and modern electrochemical studies 3. 2 Puzzles and strategy on the molecular-level study 3.3 Leap on molecular-level study──Opportunities