The practical implementation of Hazard Analysis and Critical Control Point(HACCP) in particular the definition of the Critical Control Points(CCPs) in the food industry is usually a complex system engineering. The application of Fault Tree Analysis(FTA) approach to the first and second principles of HACCP was recommended. Combined the fuzzy arithmetic and defuzzification with FTA, HACCP plans were created and updated. A software tool will be developed based on the approach introduced, aimed at simplification and automation of the hazard analysis.