The present invention relates to numerical controller having a function for collecting the data regarding machining without using external devices such as data logger and outputting the data in batch.The numerical controller comprises collection/output control unit configured to provide an interface for setting the collection information defining collection condition of the numerical control data and the peripheral equipment data and aggregation information defining the aggregation condition upon aggregating the and the peripheral equipment data and an interface for outputting the produced process data; data management unit configured to collect the numerical control data in accordance with the collection information; data collection unit configured to collect the peripheral equipment data from the peripheral equipment in accordance with the collection information; and data aggregation unit configured to produce the process data obtained by aggregating the numerical control data and peripheral equipment data in accordance with the aggregation information.