Evolution of trapped electron mode (TEM) turbulence was observed in H-mode plasmas in the Experimental Advanced Superconducting Tokamak. Unstable high- () TEM and the suppressed low- () TEM are observed when increases and decreases at . Low- TEM, sensitive to density gradient, drives finite electron heat transport and outward particle transport. While high- TEM, sensitive to electron temperature gradient, drives stronger electron heat transport and the inward particle transport when density gradients are below . The experimental characteristics of low- and high- TEMs, as well as their dependence on density and temperature gradients, were systematically investigated. Experimental identification of TEM turbulence is crucial for understanding transport in burning plasma dominated by electron heating with .