Huihui Astronomical Observatory in Shangdu of the Yuan Dynasty:From Its Beginning to the End

The history of the Huihui Astronomical Observatory,which was located at Shangdu in the Yuan Dynasty and the first observatory of Arabic style in China,is discussed.The background and preparation for founding the observatory,the establishment of the observatory,the routine work and research work at the observatory and the destroying of the observatory are analyzed.And the historical role of the observatory is pointed out.