This study was designed to analyze the time for direct and indirect nursing activity to evaluate the workload of nurses using a full Electronic Medical Record (EMR) system on practice. The result is that the mean time for nursing activity per nurse was 499.56 minutes, the mean time for direct nursing activity per nurse was 251.1 minutes (50.3%), and the mean time for indirect nursing activity per nurse was 248.42 minutes(49.7%). The time for direct nursing activity was more than the time for indirect nursing activity. There was a significant difference in the time for nursing activity according to workplace (p < 0.00*), but no difference according to nursing career. Regarding 3 duty-shifts, the time for direct nursing activity was highest in the evening shift and the time for indirect nursing activity was highest in the night shift.