The novel luminescence crystal, Na5Tm(WO4)4, has been grown from Na2WO4 melt. The single crystals as large as 2 mm×2 mm×2 mm were obtained. According to formula of crystal planes space of the tetragonal system and calculation of regtession analysis, the lattice parameters of Na5Tm(WO4)4 crystal were measured. Their values are a=1.1386 nm, c=1.1283 nm,c/a=0.991. In this Paper, the aborption, fluorescence, excitation and infrared spectra of such crystal at room temperature were measured and analysed at the same time, according to Judd-ofelt theory the intensity parameters, oscillator strengths of Tm3+ ion were measured. From these results it is noted that the Na5Tm(WO4)4 crystal is a important luminescence material at blue spectral range.