Do submillimeter galaxies trace out the most massive dark matter halos at high redshift? Mounting evidence suggests that submillimeter galaxies are the most massive gas-rich systems at redshift z~2-3 with far-infrared luminosity of 10^12-10^13 L_Sun. To answer the question, however, the statistical and large-scale properties of submillimeter galaxies are required. We have used the AzTEC 1.1 mm-wavelength camera and the Atacama Submillimeter Telescope Experiment (ASTE) 10-m telescope to perform a wide-field extragalactic survey. We have mapped ~3 deg^2 regions on the sky and revealed more than 1000 millimeter sources, resulting in one of the largest millimeter surveys to date.
In the first half of this talk, I introduce the ASTE project. In the latter half of this talk I will highlight recent findings of our deep 1.1-mm survey of submillimeter galaxies. I will also share with you recent development of instruments, especially a new mm/submm bolometer camera which makes use of TES technology and is to be installed on ASTE in early 2012.