A printing device connects to at least one client computer via a network. The printing device includes a storage section that stores image formats for general-purpose image format data. A control section converts page description language (PDL) data sent via the network from the at least one client computer into pixel map format data, converts the pixel map format data into general-purpose image format data based on one of the image formats stored in the storage section, and sends via the network to the at least one client computer the general-purpose image format data together with a source information file containing source information indicating the source of the PDL data. A memory section stores the pixel map format data obtained through the conversion performed by the control section. A printer prints the pixel map format data.