In the first part of my talk I will review sciences with the large-scale structures in the universe. In particular, I will introduce how the growing galaxy redshift data can be used to constrain cosmological models and galaxy formation theories.

In the second part a new method for measuring the cosmological parameters governing the expansion history of the universe will be introduced. The method uses the Alcock-Paczynski test applied to the overall shape of the galaxy two-point correlation function along and across the line-of-sight. We applied this method to simulated data and also to a recent galaxy survey data to obtain an impressive constraint on the dark energy equation of state and matter density parameter Ω_m.