How about, "We design to create a world, that (as much as possible) is worthy for a human to live in.

Worthy is used the right way in your sentence, but the comment below me is more correnct.

"We design to make a world that is worthy for human to live in, as possible as we can" may be rephrased to: "We are planning as much as possible, to change the world and make it acceptable to us." This is a strange concept. Your sentence is both ecological and political, and your modifier "the world" is not fully developed. Are we writing about the physical world or the political world, or the cultural world? Try to fully develop sentences, leaving your reader no doubt in what you are communicating.

Your sentence is grammatically incorrect and makes little sense. It would be better to express your idea as - We intend to create a world where human dignity is a possibility. But I think it is more positive to say - We intend to create a world where human dignity is more than a possibility. We intend to create a world where human dignity is a reality.