A cooking support method for a cooking support system, for supporting cooking by a user, connected through a network to a thermal image camera installed to take, from obliquely above the cookware, a thermal image of a region including a cookware during cooking and to a notification device capable of notifying the user of information includes: acquiring a thermal image of the region including the cookware at predetermined time intervals from the thermal image camera through the network; calculating a value indicating a change in level of a content in the cookware from the acquired thermal image; and determining whether the calculated value is not less than a predetermined threshold, determining that the content will possibly boil over the cookware when the calculated value is determined as not less than the predetermined threshold, and transmitting notification information to notify the user of the possibility of boil-over to the notification device.