Abstract
YNST (Yunnan Solar telescope) is a large solar instrument with a pure aperture of 980mm. It was designed for obtaining high-precision measurement for the solar magnetic field and atmospheric dynamic process. YNST is being installed at the Fuxian Lake in Yunnan, China. The solar observation tower includes two vertical multi-wavelength spectrographs and one Fabry-Perot interferometer system working in the 0.3 - 2.5 micron spectral range. The two spectrographs will supply high-resolution spectral data with short exposure time and a large field of view (180 '' x 180 ''), as well as the ability to work in polarized light.