We present a three-dimensional modeling of the Milky Way dust distribution by fitting the value-added star catalog of LAMOST spectral survey . The global dust distribution can be described by an exponential disk with scale-length of 3,192 pc and scale height of 103 pc . In this modeling , the Sun is located above the dust disk with a vertical distance of 23 pc . Besides the global smooth structure , two substructures around the solar position are also identified . The one located at 150 ^ { \circ } < l < 200 ^ { \circ } and -5 ^ { \circ } < b < -30 ^ { \circ } is consistent with the Gould Belt model of \citet Gontcharov2009 , and the other one located at 140 ^ { \circ } < l < 165 ^ { \circ } and 0 ^ { \circ } < b < 15 ^ { \circ } is associated with the Camelopardalis molecular clouds .