This study attempts to deal with the relationship between linguistic inventory typology (LIT) and construction grammar (CG). By a brief introduction and elucidation of the similarities and differences between them in such aspects as research objectives, research topics, pragmaticity, functionality, independence, interlingualism, meaning-form pairing, and interpretability, we find that LIT and CG, both lacking pragmaticity and functionality concerns, aim to account for the whole system of language(s) focusing on form-meaning ties, but differ on scores of independence, interlingualism, meaning-form pairing, and interpretability. It is noted that linguistic categories in LIT tend to be more mutually dependent than in CG. Cross-linguistic studies are more interesting/preferable to LIT than to CG. LIT approaches form-meaning interactively, highlighting the effects of form and its mightiness on category expressions, whilst CG, based on its unpredictability view (construction semanticity rejecting exclusive componentiality, hence, 1+1＞2), attempts to explain (diachronic or synchronic) constructional iconicity, inheritage, developments and relationships, as well as constructional networks and generalisation for constructional cognition. Given these orientation differences, LIT and CG can be held as sister-paradigms within the same scope of cognitive linguistics and can reach a ‘win-win’ interpretation of a(ny) language system by mutual-complementarity: 1) If CG is adept at constructional irregularities, LIT is good at linguistic regularities; 2) LIT and CG can borrow key conceptions from each other; 3) The two linguistic paradigms can co-occur or cooperate in interpreting some issues for greater plausibility.