Emission spectra of two atoms coupled by dipoie-dipole force in two-mode cavity fields are studied. It is found that emission spectra manifest the following new properties when two-mode cavity fields are initially in various-number states. When two fields are all in vacuum states, the spectrum shows six peaks and five peaks alternately, with the increase of δ＝ｇa／ｇ. Furthermore, the non-symmetric five peaks appear in the spectrum when δ is very small, which reflects the atomic dipole-dipole interaction more sensitively compared with the spectrum of two atoms in a single-cavity. The spectrum consists of symmetric six peaks and distance between each two symmetric peaks is proportional to (2ｎ2)１／２ｇ when one of the fields is in the vacuum states and the other is a strong field. However when one of the fields is in the vacuum state and the other in number state and δ＝2１／２，the spectrum will generally show non-symmetric six peaks structure, but when ｎ2＝５, it becomes non-symmetric five peaks structure.