Jia̍t-le̍k-ha̍k pêng-hêng (熱力學平衡; thermodynamic equilibrium), kán-chheng jia̍t-pêng-hêng (熱平衡), sī chi̍t ê jia̍t-le̍k-ha̍k hē-thóng tī bô gōa-kài éng-hióng ê tiâu-kiāⁿ chi-hā, hē-thóng ê hông-koan bu̍t-lí-liōng lóng chin chiâu-ûn ê chōng-hóng.