Digital rate meter and radiation monitoring system using digital rate meter

The invention accurately measures the radiation rate and counts value. A digital rate meter (2a) has a reception section (21) that receives the transmission signal including the count value; a count extraction section (22) that extracts, for each transmission period, the count value and outputs an extraction count value based on the extracted count value; a pulse generation section (23) that converts, for each transmission period, the extraction count value output into a pulse train of a corresponding pulse number and outputs the obtained pulse train; a rate calculation section (24) that performs rate calculation based on the extraction count value to calculate a dose rate; and a recorder output section (25) that outputs the dose rate according to preset form.