A method for determining a status of at least one machine includes the following steps: a processing unit is utilized to receive and record spindle load values of the spindle in a period of time to generate a spindle load record of the spindle, and to determine if a preset condition is matched according to the spindle load record. When the preset condition is matched, the processing unit is utilized to determine a present category corresponding to the spindle load record of the spindle, and to obtain parameter-to-be-collected information corresponding to the present category. The processing unit is utilized to obtain at least one value of at least one collected parameter of the at least one machine according to the parameter-to-be-collected information corresponding to the present category, and to determine a status of the at least one machine according to the obtained value of the at least one collected parameter.