The BOES (BOAO Echelle Spectrograph), a fiber-fed echelle spectrograph of the BOAO 1.8 m telescope, has been designed and now is being manufactured. The BOES follows a white pupil design collimated with two off-axis parabolic mirrors. The 136mm collimating beam leaving the 41.59 grooves/mm R4 echelle grating is refocused near the narrow folding mirror. Through the two cross-disperser prisms and ϕ250mm(f/1.5) ϕ250mm(f/1.5) transmission camera, the beam images on EEV 2k×4k 2k×4k CCD. The BOES can take the wavelength range of 3700 to 10100Å at a single spot with spectral resolution R = 20000 to 40000 depending on the fiber set employed. We describe the key sciences and performance, current status of construction, and future plan of the BOES.

• 김강민(한국천문연구원 보현산천문대, 경북대학교 천문대기과학과) | KIM KANG-MIN (Bohyunsan Optical Astronomy Observatory, Korea Astronomy Observatory/Dept. of Astronomy and Atmospheric Sciences, Kyungpook National University)
• 장정균(한국천문연구원 보현산천문대) | JANG JEONG GYUN (Bohyunsan Optical Astronomy Observatory, Korea Astronomy Observatory)
• 천무영(한국천문연구원 보현산천문대) | CHUN MOO-YOUNG (Bohyunsan Optical Astronomy Observatory, Korea Astronomy Observatory)
• 박병곤(한국천문연구원 보현산천문대, 경북대학교 천문대기과학과) | PARK BYEONG-GON (Bohyunsan Optical Astronomy Observatory, Korea Astronomy Observatory, Dept. of Astronomy and Atmospheric Sciences, Kyungpook National University)
• 형식(한국천문연구원 보현산천문대) | HYUNG SIEK (Bohyunsan Optical Astronomy Observatory, Korea Astronomy Observatory)
• 한인우(한국천문연구원 보현산천문대) | HAN INWOO (Bohyunsan Optical Astronomy Observatory, Korea Astronomy Observatory)
• 윤태석(경북대학교 천문대기과학과) | YOON TAE SEOG (Dept. of Astronomy and Atmospheric Sciences, Kyungpook National University)
• STEVEN S. VOGT(미국 리크 천문대)