This　paper　forwards　a　neural　network　based　VLSI　power　estimation　Simulator　(NBPE)　for　VLSI　specification　design　with　a　graphical　user　interface　developed.　The　user　can　enter　parameters　from　VLSI　specification　such　as　IO　number,　frequency,　flash　depth　and　parameters　on　neural　network　structure　such　as　layer　number,　learning　algorithm　etc.　This　simulator　then　estimate　VLSI＇s　power　based　on　given　information.　Power　estimation　results　can　be　used　to　adjust　VLSI　specification　design　before　further　implementation.　Available　as　an　executable　code,　the　simulator　can　run　on　various　platforms.