In a numerical control device, a command read out unit sequentially reads out time or a position of an axis or a spindle which is a reference and a position of a different axis or spindle from the axis or the spindle which is the reference or an auxiliary function that are stored in a storage unit. A selection unit selects a processing unit that processes a command which is read out by the command read out unit on the basis of a definition set by a definition unit. The definition unit defines commands executed by each processing unit.