A progressive-lens designing system according to an embodiment of the invention includes a manufacturer-side terminal (100) installed at a lens manufacturer and a shop-side terminal (200) installed in a spectacle shop or any other location, the manufacturer-side terminal (100) and the shop-side terminal (200) are connected to each other via a network (300). The manufacturer-side terminal (100) includes an optimization coefficient setting section (122) that uses a variety of data received from the shop-side terminal (200) to set an optimization coefficient for each target object in a specific work environment, a dioptric power computing section (123) that computes a target dioptric power for each target object, a lens designing section (124) that performs lens design, and an order processing section (125) that performs order processing when receiving an order placed from the shop-side terminal (200).
