A server may include a communication circuit, at least one processor electrically connected to the communication circuit, and at least one memory electrically connected to the at least one processor. The at least one memory stores instructions for receiving, from a first external device, first data related to a user input that requests performance of a task, receiving, second data associated with a plurality of application programs, determining a domain related to the task based on at least some of the first data and at least some of the second data, determining a likely intention of a user providing the user input, based on at least some of the first data, and determining a sequence of states of the first external device based on the domain and the likely intention, providing the sequence of states to the first external device.