The purpose of this study is to determine the geochemical characteristics for the stream sediments in the Konyang area. So we can estimate the environment contamination and understand geochemical disaster. We collect the stream sediments samples by wet sieving along the primary channels and slowly dry the collected samples in the laboratory and grind to pass a 200mesh using an alumina mortar and pestle for chemical analysis. Mineralogy, major, trace and rare earth elements are determined by XRD, XRE, ICP-AES and NAA analysis methods. For geochemical characteristics on the geological groups of stream sediments, the studied area was grouped into quartz porphyry area, sedimentary rock area, anorthosite area and gneiss area. Contents of major elements for the stream sediments in the Konyang area were $SiO_2;41.86{sim}76.74;wt.%,;Al_{2}O_{3};9.92{sim}30.00;wt.%,;Fe_{2}O_{3};2.74{sim}12.68;wt.%,;CaO;0.22{sim}3.31;wt.%,;MgO;0.34{sim}3.97;wt.%,;K_{2}O;0.75{sim}0.93;wt.%,;Na_{2}O;0.25{sim}1.92;wt.%,;TiO_{2};0.40{sim}3.00;wt.%,;MnO;0.03{sim}0.21;wt.%,;P_{2}O_{5};0.05{sim}0.38;wt.%$. The contents of trace and rare earth elements for the stream sediments were $Cu;7{sim}102;ppm,;Pb;15{sim}47;ppm,;Sr;48{sim}513;ppm,;V;29{sim}129;ppm,;Zr;31{sim}217;ppm,;Li;14{sim}94;ppm,;Co;5.6{sim}32.1;ppm,;Cr;23{sim}259;ppm,;Cs;1.7{sim}8.7;ppm,;Hf;2.1{sim}109.0;ppm,;Rb;34{sim}247;ppm,;Sc;4.5{sim}21.9;ppm,;Zn;24{sim}609;ppm,;Sb;0.8{sim}2.6;ppm,;Th;3{sim}213;ppm,;Ce;22{sim}1000;ppm,;Eu;0.7{sim}5.3;ppm,;Yb;0.6{sim}6.4;ppm$. Generally, the contents of $Al_{2}O_{3};and;SiO_2$ had a good relationships with each other in rocks but it had a bad relationships in stream sediments for this study area. The contents of $Fe_{2}O_3$, CaO, MnO and $P_{2}O_{5}$ had a good relationships with major and minor elements in stream sediments of this study area. The contents of Co and V in the stream sediments had a good relationships with other toxic elements.