Selecting high redshift galaxies through their strong emission in the Lyman alpha feature using the narrow-band imaging method has come to be a very effective technique to isolate high redshift galaxies. Objects selected in this way are called Lyman Alpha Emitters (LAE). At redshift z ∼ 3, there are several hundreds of spectroscopically confirmed LAE by several groups. In this work, we discuss LAE observational data both from photometric observation and spectroscopic follow-up observation. We then use our LAEs at z ∼ 3 to measure LAE number densities and the clustering correlation function. We also performed a cross-correlation analysis of LAE and LBG (Lyman break galaxies).