SuperMap.Marker 在classic api中只提供了可以设置imgicon的参数。不能为其设置style。如果你那边想为点设置数字,建议使用
SuperMap.Feature.Vector对象可以设置style 
var geometry = new SuperMap.Geometry.Point(105, 35);
var pointFeature = new SuperMap.Feature.Vector(geometry);
var styleTest = {
      label:"supermap",
      fontColor:"#0000ff",
      fontOpacity:"0.5",
      fontFamily:"隶书",
      fontSize:"8em",
      fontWeight:"bold",
      fontStyle:"italic",
      labelSelect:"true",
   }
         pointFeature.style = styleTest;
        vectorLayer.addFeatures([pointFeature]);