Diversity of the Danube territorial capital is the part of World Heritage public investment - biodiversity, environmental protection, sustainable development, reducing poverty and increasing social inclusion, continued development of the global economic welfare, promote a healthy environment, conservation of bio-resources as a “European Axis” , business development in the context of eco-bio-economic, diplomatic instruments promoting eco-bio-economic development, food security, public health, are only several ideas of a smart modern world, which can be attached to development philosophy type “smart power” and contextual intelligence world for Sustainable Development Smart (Smart Sustainable Development) by Sustainable Diplomacy Smart (Smart Sustainable Diplomacy) in diversity of the Danube territorial capital, which can be a key ingredient of success for Excellence in Foreign Affairs Diplomatic and intelligence dedicated Environmental and Eco- Bio-Economy (SMART & Excellence in Environmental and Eco-Bio-Economic Affairs).