The characteristics of an extracavity pumped Sr:WO4 anti-Stokes Raman lasers at 969 nm are studied. The Sr:WO4 Raman resonator is pumped by an actively Q-switched Nd:YAG laser at 1064 nm with its axis tilted from the pumping laser direction. The non-collinear phase matching between the pumping radiation, the generated first Stokes and the first anti-Stokes radiations are achieved. Besides the first anti-Stokes laser radiation, three orders of Stokes laser radiations are generated simultaneously. The output energy, temporal and spectral information of the output laser radiations are investigated. At the highest pumping laser energy of 120 mJ, the highest energy of the anti-Stokes radiation is 0.74 mJ with the pulse width of 3.9 ns. Meanwhile, the total output energy of the Stokes radiations is 23.9 mJ with 19.6 mJ of 1323 nm second Stokes component. The conversion efficiency from the pumping radiation to the Stokes and anti-Stokes radiations is 20.5%.