We overview the research on interactive evolutionary computation (IEC). The IEC is an EC that optimizes systems based on human subjective evaluation. First, the definition and features of the IEC are described. Then, the overview of the IEC research follows. The overview consists of two parts: application and interface researches. The IEC application fields in this survey include graphic art and animation, 3-D CG lighting, music, editorial design, industrial design, face image generation, speech processing and synthesis, hearing aid fitting, virtual reality, media database retrieval, data mining, image processing, control and robotics, food industry, geophysics, education, entertainment, and so on. The interface research to reduce human fatigue in this survey includes interfaces of fitness input and display based on fitness prediction, accelerating EC convergence especially in early EC generations, combinations of interactive and normal ECs, and active user intervention. Finally, we discuss the IEC from the point of the future research direction of computational intelligence. The biggest feature of this paper is to wholly survey them with 200 IEC papers rather than to carefully select representative papers to show the status quo of the IEC researches.