In this study, we analyzed the effects of radiation exposure, as compared to the hematological parameters change of medical radiation workers and the public. The mean value of all hematological parameters were in the normal range. Eosin mean value of the radiation workers(2.52 ± 1.79%) showed that a significantly lower than the control group(2.92 ± 1.39%). In the comparison of the results depending on the occupation period, it showed high value that the mean of the radiation workers group WBC, platelet, Lymph, Mono, Baso. Over 20 years of radiation workers WBC, Mono showed low values and less than 10 years of radiation workers mean value of Baso showed low values, there was no statistical significance. In the comparison of the results depending on the 4 years cumulative radiation dose, Over 5.0 m㏜ of Radiation works RBC(4.61 ± 0.53 vs 4.91 ± 0.38), Hct(41.51 ± 4.07 vs 43.97 ± 3.40), Eosin(1.74 ± 1.14 vs 2.92 ± 1.39) showed low value, it was statistical significance. 0.5∼1.0 m㏜ radiation exposure workers Hb (13.93 ± 1.75) showed a significantly lower value than that of the control group (14.90 ± 1.29).