This book constitutes the thoroughly refereed post-workshop proceedings of the 5th International Workshop on Structured Object-Oriented Formal Language and Method, SOFL+MSVL 2015, held in Paris, France, in November 2015. The 15 papers presented in this volume were carefully reviewed and selected from 22 submissions.  The focus of this workshops was on following subjects: Modeling, specification, verification, model checking, testing, debugging, transformation, and algorithm.