A method and an apparatus for a complete size adaptation of an object to be displayed are provided. The method includes obtaining elements and description information of the elements included in an object to be displayed, the description information of the elements including information of parent-child relationships among the elements and rules for adaptation into display areas of different sizes based on the parent-child relationships; determining sizes and positions of the elements that are included in the object to displayed and are adapted to a current display area based on the elements and the description information of the elements that are obtained and size information of the current display area; and displaying the elements included in the object to be displayed in the current display area using the sizes and the positions that are determined.