A weighing and packaging system includes a plurality of weighing machines, a plurality of packaging machines, and a control unit. The plurality of weighing machines are configured to weigh articles supplied thereto. The plurality of packaging machines, each of which forms a weighing and packaging unit with a corresponding weighing machine among the plurality of weighing machines, are configured to receive a supply of the articles weighed and discharged by the corresponding weighing machine, and package the articles supplied thereto. The control unit is configured to, in a case where a problem occurs in at least one of weighing by the weighing machine and packaging by the packaging machine in any of the weighing and packaging units, change processing capacities of the weighing machine and the packaging machine of at least some of the weighing and packaging units other than the weighing and packaging units in which the problem occurs.