A control apparatus, comprising: receiving means for receiving an instruction for a sheet processing by a sheet processing apparatus, the sheet processing apparatus being able to perform a binding process and a folding process for a plurality of sheets; and control means for controlling, according to the instruction received by the receiving means, the sheet processing apparatus to execute a saddle-stitching binding process or a center-folding process, the saddle-stitching binding process being for performing a binding process and a folding process for the plurality of sheets, the center-folding process being for performing a folding process for the plurality of sheets without performing a binding process for the plurality of sheets, characterized in that the control means is configured to control: in a case where the number of sheets of the plurality of sheets is more than a number of the sheets which is permitted to be subjected to the center-folding process, the sheet processing apparatus to generate a plurality of booklets which are subjected to the center-folding process, and in a case where the number of sheets of the plurality of sheets is more than a number of the sheets which is permitted to be subjected to the saddle-stitching binding process, the sheet processing apparatus to generate a plurality of booklets which are subjected to the saddle-stitching binding process, wherein the number of the sheets which are permitted to be subjected to the center-folding process is less than th number of the sheets which are permitted to be subjected to the saddle-stitching binding process. receiving means for receiving an instruction for a sheet processing by a sheet processing apparatus, the sheet processing apparatus being able to perform a binding process and a folding process for a plurality of sheets; and control means for controlling, according to the instruction received by the receiving means, the sheet processing apparatus to execute a saddle-stitching binding process or a center-folding process, the saddle-stitching binding process being for performing a binding process and a folding process for the plurality of sheets, the center-folding process being for performing a folding process for the plurality of sheets without performing a binding process for the plurality of sheets, characterized in that the control means is configured to control: in a case where the number of sheets of the plurality of sheets is more than a number of the sheets which is permitted to be subjected to the center-folding process, the sheet processing apparatus to generate a plurality of booklets which are subjected to the center-folding process, and in a case where the number of sheets of the plurality of sheets is more than a number of the sheets which is permitted to be subjected to the saddle-stitching binding process, the sheet processing apparatus to generate a plurality of booklets which are subjected to the saddle-stitching binding process, wherein the number of the sheets which are permitted to be subjected to the center-folding process is less than th number of the sheets which are permitted to be subjected to the saddle-stitching binding process. in a case where the number of sheets of the plurality of sheets is more than a number of the sheets which is permitted to be subjected to the center-folding process, the sheet processing apparatus to generate a plurality of booklets which are subjected to the center-folding process, and in a case where the number of sheets of the plurality of sheets is more than a number of the sheets which is permitted to be subjected to the saddle-stitching binding process, the sheet processing apparatus to generate a plurality of booklets which are subjected to the saddle-stitching binding process, wherein the number of the sheets which are permitted to be subjected to the center-folding process is less than th number of the sheets which are permitted to be subjected to the saddle-stitching binding process.