A print control system comprising: a print control device, and a printer comprising a communication control unit configured to communicate, via a first communication path (KT1b) and a second communication path (KT2b), with the print control device using WebSocket communication; wherein the print control device is configured to send print data via the first communication path (KT1b) to the printer without receiving a request from the printer, the print data including information to be printed; wherein the printer configured to receive the print data sent by the print control device via the first communication path (KT1b), convert the received print data, which is in a markup language format, to a control command, and to print in accordance with the received print data based on the converted control command; wherein the printer includes a print unit configured to print, a print control unit configured to control the print unit based on the print data, and a status management unit configured to manage the status of the printer and to generate status data; wherein the print control device includes a print data processing unit configured to process the print data and a status processing unit configured to process the status data of the printer received from the printer via the second communication path (KT2b); wherein the first communication path (KT1d) based on a WebSocket connection is established between the print control unit of the printer and the print data processing unit of the print control device, and the second communication path (KT2b) based on the WebSocket connection is established between the status management unit of the printer and the status processing unit of the print control device; and wherein the print data processing unit of the print control device is configured to manage the printer identification information of one or more printers connected to the print control device and to add the printer identification information of the printer to be used for printing to the print data, and a communication management unit of the print control device is configured to send the print data via the first communication path (KT1d) to the printer based on connection identification information relating to the printer identification information included in the print data. a print control device, and a printer comprising a communication control unit configured to communicate, via a first communication path (KT1b) and a second communication path (KT2b), with the print control device using WebSocket communication; wherein the print control device is configured to send print data via the first communication path (KT1b) to the printer without receiving a request from the printer, the print data including information to be printed; wherein the printer configured to receive the print data sent by the print control device via the first communication path (KT1b), convert the received print data, which is in a markup language format, to a control command, and to print in accordance with the received print data based on the converted control command; wherein the printer includes a print unit configured to print, a print control unit configured to control the print unit based on the print data, and a status management unit configured to manage the status of the printer and to generate status data; wherein the print control device includes a print data processing unit configured to process the print data and a status processing unit configured to process the status data of the printer received from the printer via the second communication path (KT2b); wherein the first communication path (KT1d) based on a WebSocket connection is established between the print control unit of the printer and the print data processing unit of the print control device, and the second communication path (KT2b) based on the WebSocket connection is established between the status management unit of the printer and the status processing unit of the print control device; and wherein the print data processing unit of the print control device is configured to manage the printer identification information of one or more printers connected to the print control device and to add the printer identification information of the printer to be used for printing to the print data, and a communication management unit of the print control device is configured to send the print data via the first communication path (KT1d) to the printer based on connection identification information relating to the printer identification information included in the print data.