A printing system in which a series of conveyance paths to convey a recording medium is formed across a printer and a post-processing device, the printing system comprising: a detection unit that is configured to detect that the post-processing device has entered a predetermined state; and a control system including a printer control unit and a post-processing device control unit, wherein the printer control unit has a CPU and a control field-programmable gate array, wherein the CPU is configured to control the entire printer, and the control field-programmable gate array is configured to control operations in the printer in collaboration with the CPU, wherein the control field-programmable gate array has a paper feeding control unit, wherein the paper feeding control unit that is configured to limit a number of recording media fed to the conveyance path, when it is not detected that the post-processing device has entered the predetermined state, based on a number of recording media conveyable to the post-processing device after the post-processing device enters the predetermined state, wherein the post-processing device comprises a sheaf processing unit that is configured to perform processing where the recording media printed by the printer are bound with a binding member for every designated number of recording media and a sheaf of recording media is thus generated and ejected, wherein the post-processing device control unit has the detection unit, a further control field-programmable gate array and an external interface unit, wherein the further control field-programmable gate array is configured to control operations in the post-processing device, wherein the further control field-programmable gate array has a binding control unit which is configured to control the sheaf processing unit, wherein the external interface unit allows the post-processing device control unit to communicate with the printer control unit, the detection unit is configured to detect, as the predetermined state, that a remaining number of the binding members has become N, wherein N is a predetermined number, at a timing when the sheaf is ejected. a detection unit that is configured to detect that the post-processing device has entered a predetermined state; and a control system including a printer control unit and a post-processing device control unit, wherein the printer control unit has a CPU and a control field-programmable gate array, wherein the CPU is configured to control the entire printer, and the control field-programmable gate array is configured to control operations in the printer in collaboration with the CPU, wherein the control field-programmable gate array has a paper feeding control unit, wherein the paper feeding control unit that is configured to limit a number of recording media fed to the conveyance path, when it is not detected that the post-processing device has entered the predetermined state, based on a number of recording media conveyable to the post-processing device after the post-processing device enters the predetermined state, wherein the post-processing device comprises a sheaf processing unit that is configured to perform processing where the recording media printed by the printer are bound with a binding member for every designated number of recording media and a sheaf of recording media is thus generated and ejected, wherein the post-processing device control unit has the detection unit, a further control field-programmable gate array and an external interface unit, wherein the further control field-programmable gate array is configured to control operations in the post-processing device, wherein the further control field-programmable gate array has a binding control unit which is configured to control the sheaf processing unit, wherein the external interface unit allows the post-processing device control unit to communicate with the printer control unit, the detection unit is configured to detect, as the predetermined state, that a remaining number of the binding members has become N, wherein N is a predetermined number, at a timing when the sheaf is ejected.