[Objective] This paper reviews the expert retrieval and expert ranking literature to provide theoretical foundations for fixture studies. [Coverage] 65 papers were retrieved from the Web of Science (WOS), CNKI and other databases using the keywords of "expert retrieval", "expert ranking", and "ranking fusion". [Methods] We analyzed research evaluating expert retrieval and fusion rankings, aiming to solve the issues of insufficiency of expert coverage and heavy computation of expert features. [Results] We found that most expert retrieval system adopted the relationship attribute fusion method, ...