The note is my padnote of Complex Analysis, written for recording what I have learnt. As for the textbook, I mainly referred to the first seven chapters of 复变函数 written by 史济怀&刘太顺 and the fourth and fifth chapters of Complex analysis written by Stein. The theory, mainly about the holomorphic functions, manifest an interesting world of analysis different from what I had learnt. Maybe I can have a deeper understanding after learning Riemann Surface.