Abstract: As an effective method for simulating the uncertainty of physical phenomena,ensemble simulation is widely used in various fields.To better explain the complex data generated by ensemble simulation,many effective visualization methods have emerged.However,one important research gap is the absence of a unified framework to organize these works.This paper reviews and discusses the visualization of ensemble scalar fields from three perspectives:information extraction,trend separation,and visual mapping,and points out the existing problems and possible research trends in the future.This review aims to provide a new and comprehensive insight to understand the design space of ensemble scalar field visualization and help the new-comers in this field to quickly understand the current research and find the technology or research point they need.