It is necessary to consider the uncertainty of spatial data and fuzziness of relative conception when discussing the description of spatial relation and reasoning because of the complexity of direction relation induced by the fuzziness of direction concept and inherent uncertainty of spatial data. Two fuzzy models are introduced based on classical fuzzy set. In 4-directions fuzzy model the space is divided into four cardinal directions and each direction has equal angle

but each main cardinal direc-tion has 60° and each secondary cardinal direction has 30° in 8-directions fuzzy asymmetric model. Extended 8-directions fuzzy asymmetric model is introduced based on interval type-2 fuzzy sets which takes the positioning error of reference point into ac-count. The primary membership function and the uncertainty of primary membership grade is discussed too. The difference be-tween this model and the cone-based model is comparatively analyzed. Two cases are provided in the last. The first case is used to analysis the attributes of 8-directions fuzzy asymmetric model and the second case shows the process of determining the direction relation between point with positioning error and polygon.