This paper aims to develop the content of local dance through music and dance in the Baekje period. First of all, it is necessary to research articles on musical instruments during the period. According to precedent research, there are either nine or eight types of wind instruments: jeok, so, saeng, ji, dopipilul, makmok, kak, wu, and baekje-saenghwang; seven types of string instruments: pa, wanham(3 strings), konghoo, sukonghoo, keum, jaeng, and baekje 8 hyonkeum; and two types of percussion: ko and yoko. These instruments number eighteen or seventeen in total, and the tones are clear and elegant. Today there are A-ak and dance in the ancestral ritual for Woongjin Baekje five kings as the content of music and dance in the Baekje period. The resource of them was brought from A-ak of Kook-jo-o-re-ui written 800 years after the Baekje period. However, the time period between them is too distant, and several instruments among A-ak had not existed in the Baekje period. There are few Korean references which can be traced back to the Baekje dance. Therefore we could should refer to Japanese dances such as Sinsoriko and Onintei, created by people a man from Baekje and originated in Baekje. Those dances are still practiced and passed down to new generations in Japan, thus we can develop the content of the Baekje court dance incorporating elements of the two Japanese dances. The Baekje court dance can be choreographed with some constraints. Music should be played by three to five musicians, dancers should consist of two to six performers, and the range of movements is also guessed. This content will be different from established works and unique, if it is utilized for the pre-ceremony dance of the Baekje ancestral ritual, or for performances about Baekje.