Abstract: The roaster includes two handles disposed at both sides of an upper portion of the roaster, two opposite racks respectively fixed at a front end and a rear end of the two handles, electric heating tubes arranged between the two handles, an oil-gathering pan located in a lower portion of the roaster, a guide tube disposed in an inner sidewall of the roaster and extending from an inner sidewall of one of the two handles to the oil-gathering pan, and a grill pan which is located on a top end of the roaster and of which bottom is connected with the guide tube so that excess oil and sauce remained in the grill pan will be guided through the guide tube into the oil-gathering pan, by which the grill pan is capable of being placed above and across the opposite racks of the two handles and being fixed at corresponding locations for grilling meat so as to fully using the inner and outer spaces of the roaster for achieving the multi-function of roasting and grilling in one roaster and saving electricity.