In a substrate production simulation method, production of a product substrate on which mounting of a component supplied from a component supply device is completed is simulated using a substrate production line including a mounting line in which multiple component mounters for mounting the component on a substrate are arranged. The method includes steps (a) to (c). In the step (a), a first result is obtained by simulation on the assumption that provision and collection of the component supply device with respect to the substrate production line are performed without delay. In the step (b), a second result is obtained by simulation on the assumption that provision and/or collection of the component supply device with respect to the substrate production line is performed by an automated facility and/or a worker. In the step (c), the first result and the second result are output to the same screen in a form indicating a transition of a production number of product substrates with respect to time.