A take-up rate and a let-off rate in warp feed on a loom are controlled while a displacement of a cloth fell position is taken into account. The system comprises a cloth fell position compensation circuit (2) which outputs a cloth fell compensation signal to compensate a displacement of the cloth fell position when a weaving condition such as a target weft density, a target warp tension or the kinds of weft and warp yarns is changed. The cloth fell compensation signal is added to a basic warp feed rate obtained from target weft density, so that the displacement motion of the cloth fell is completed in a shorter time. According to this compensation, a weft density of a resultant fabric rapidly coincides with the target weft density.