The WCCS19 will be organized by Ibn Zohr University; Moroccan Society of Complex Systems and National College of IT (ENSIAS, Mohamed V Souissi University) in partnership with IEEE Moroccan section and International Academy for Systems and Cybernetic Science during April 22-25, 2019 in Ouarzazate-Morocco. The WCCS19 will provide a high-level international forum for researchers and Ph. D. students who will present recent research results, address new challenges and discuss trends in the area of complex systems and interdisciplinary science.