An application deployment method and a scheduler are disclosed. The method includes: receiving, by a scheduler, an application deployment request sent for a first application by a cloud controller of a first cloud; after receiving the application deployment request, sending, by the scheduler, a first query message and a second query message to a cloud controller of a second cloud, and sending a second query message to a cloud controller of a third cloud; determining, by the scheduler, a target calculation unit from at least one calculation unit that is obtained by querying by using the first query message and the second query message and that has a first calculation capability; and deploying, by the scheduler, the first application to the target calculation unit.