A dynamic alarm generation method of a biological particle monitor according to the present invention includes the steps of: (a) receiving particle information[i] from the biological particle monitor; (b) calculating an effective biological particle[i] and an upper bound[i] of the effective biological particle from the particle information[i]; (c) calculating a moving sum[i] of the number of times exceeding a relative concentration, a moving sum[i] of the number of times exceeding a long-term low concentration, and a moving sum[i] of the number of times exceeding a short-term high concentration from the upper bound[i] of the effective biological particle; (d) determining whether or not the moving sum[i] of the number of times exceeding the relative concentration, the moving sum[i] of the number of times exceeding the long-term low concentration, and the moving sum[i] of the number of times exceeding the short-term high concentration respectively exceed a relative concentration alarm criterion[i], a long-term low concentration exceeding time, and a short-term high concentration exceeding time; and (e) generating a corresponding alarm if it is determined that any one of the relative concentration alarm criterion[i], the long-term low concentration exceeding time, and the short-term high concentration exceeding time is exceeded, and steps (a) to (e) are repeated every unit time.