As the widespread application of information technologies in Industrial Control System (ICS), ICSs have gradually transformed from closed systems to open and interconnected ones, encountering with the challenges to network security. This paper elaborates on the current situation of information security in ICS through security events. Then, it focuses on the ICS’s architecture and the differences between ICS information security and traditional network security. Moreover, it systematically analyzes the proceedings of the ICS & SCADA Cyber Security Research 2018 (ICS-CSR 2018). Besides, it classifies and examines the proposed security solutions regarding the system architecture and communication protocols. Finally, drawing on the current solutions and in response to actual requirements, this paper summarizes three key directions: network attack models, the ICS’s simulation platforms, and the non-technical Human-Machine Interface (HMI) technology.