The spectroscopic and upconversion properties of Er3+-doped aluminosilciate and phosphate glasses were studied in this work. High erbium ion concentration ranging from (1.5～3.6)×10^{20} cm-3 was used in these two glasses. Yb3+[(0～3.6)×10^{20} cm-3] ions were codoped in these glasses. It is found that the emission properties of Er3+-doped aluminosilicate glass is greatly affected by OH group at high erbium concentration. More than 6ms fluorescent lifetime can be achieved in Ef3f-doped aluminosilicate glass at 3.6×10^{20} cm-3 Er3+ ion concentration after water removing process, and as broad as 60 nm FWHM can be achieved in this glass. Intensities of emission and upconversion fluorescence of both glasses increase with the increase of Yb3+ ion concentrations. Compared with Er3+-doped aluminosilicate glass, doped phosphate glass has higher emission cross section and narrow FWHM (35～40 nm), long fluorescent lifetime (7 ms) and low upconversion fluorescent intensity. With the increase of Yb3+ concentration, 2H11/2→4I15/2 (525 nm) fluorescent intensity becomes stronger, 4S3/2→4I15/2 (545 nm) emission weakens in either of the glasses.