Earthquake liquefaction of saturated sandy soils may induce severe damage，and this issue has become an important research topic in the field of soil dynamics.To judge the potential for earthquake liquefaction and to evaluate liquefaction hazards can lead to better control and prediction of liquefaction.Liquefaction discrimination may be considered first by making a preliminary judgment.Preliminary judgment，according to available survey data or a simple testing method，may provide a determination of the initial level of soil liquefaction.Further discrimination is necessary for soil layers where earthquake liquefaction may occur，as determined by the preliminary judgment.Since there are many factors affecting soil liquefaction，we recommend an empirical method that includes the standard penetration test，the static cone penetration （static sounding）test，and the shear wave velocity method.The single discrimination method has limitations in its scope of application；therefore，a combination of various methods is more reliable.Liquefaction hazard evaluation adopts a harmfulness index to analyze the degree of harm caused to buildings by liquefaction.Evaluation methods mainly include the liquefaction index method，the seismic settlement value method，the spectrum intensity ratio method，and the synthetic method.Based on the evaluation index，a comprehensive liquefaction ranking can fully reflect the potential and extent of the liquefaction hazard.