This book constitutes the thoroughly refereedpost-conference proceedings of the 22nd International Workshop onAlgebraic Development Techniques, WADT 2014, held in September 2014 in Sinaia,Romania.The 8 revised papers presented were carefully reviewed and selected from 13presentations and focus together with one invited paper on foundations ofalgebraic specification, approaches to formal specification including processcalculi and models of concurrent, distributed and mobile computing,specification languages, methods, and environments, semantics of conceptualmodeling methods and techniques, model-driven development, graphtransformations, term rewriting and proof systems, integration of formalspecification techniques, formal testing and quality assurance, validation, andverification.