This study was focused on the sanitary analysis of hazard factors and the establishment of critical control points on hamburger by the microbiological investigation. The degree of microorganic pollution on the ingredients and equipments for hamburger manufacturing and the variation of microorganisms at storage time and temperatures were investigated. The magnitudes of total aerobic bacteria In hamburger were highly detected to be in the order of resting placed in expressway > convenience stores > fast food stores, and coliforms were lowly detected as convenience stores > fast food stores > resting places in expressway. In investigation of basic ingredients, the degree of microorganic pollution showed highly on patty. cabbage and cucumber. In investigated result of mocroorganic distribution at the various phases in hamburger manufacturing, total aerobic bacteria counts were detected over 5.5$ imes$10$^2$ CFU/g, and coliforms counts were detected over 2.0$ imes$10$^2$ CFU/g. In investigated result of microorganic distribution on the instruments and equipments for hamburger manugacturing, total aerobic bacteria counts were detected over 10$^$5/ CFU/100cm2 and coliforms counts were detected over 10$^2$CFU/100㎠. Staphylococcus aureus was detected at wagon and refrigerator. Salmonella spp. was detected at grinder and Vibrio parahaemolyticus was not detected. At various storage temperatures, total aerobic bacteria counts insreased 3.0$ imes$10$^3$ CFU/g to 7.0$ imes$10$^4$ CFU/g, 4.2$ imes$10$^$7/ CFU/g and 8.1$ imes$10$^$8/ CFU/g at 10$^{C}$, 20$^{C}$, 30$^{C}$ after 48 hours respectively. coliform counts also increased 4.5$ imes$10$^2$ CFU/g to 2.2$ imes$10$^3$ CFU/g, 5.4$ imes$10$^$5/ CFU/g, 4.5$ imes$10$^$6/ CFU/g at 10$^{C}$, 20$^{C}$, 30$^{C}$ after 48 hours respectively. The establishment of critical control point CCP was divided into CCP1 and CCP2 by the removing level of hazard factor, and then CCP1 was established on basic ingredients, and CCP2 was established on the phases of mixing, pouring, packaging, transporting and preserving.