A print processing result can be more certainly obtained while reducing a processing load of a printer. A print server forms a job tracing ID for a print job whose processing result is to be confirmed and transmits to a network printer. Thereafter, when the print job is formed in the network printer, the print server obtains information of the print job from the network printer. The job tracing ID has been allocated to the information of the print job. If it is decided based on the job tracing ID included in the information of the print job that the obtained information of the print job is not the information of the print job which is being traced, the print server determines that the print job which is being traced has been extinguished. The print server inquires the processing result of the extinguished print job from the network printer by using the job tracing ID.