Fire brings civilizations to human, at the same time it brings risk to human. To prevent and control fire is one of the important fields of fire researches, and fire risk analysis and fire modeling are premises to study fire prevention and fire control. This paper reviews on modelling of fire physics and fire risk assessment. The conformation of this paper is introduced in section 1, developments of fire risk assessment are reviewed in section 2, fire growth models (including field model, zone model, network model, are reviewed in section 3); some practical software package of fire risk assessment are introduced in section 4. Finally, the future development of fire risk analysis is prospected.