Melts based on lithium salts are applied in various branches of engineering and scientific research [1]. It requires improved methods to search lor low-melting compounds and data on phase equilibrium in systems ot"three or more components. We have proposed a settlement- graphic way to select the salt compositions by two properties (temperature and specific enthalpy of melting) in the case studies the five-component system Li // F, Br, VO3, MoO4, SO4.