2054.1	Assessment
Research Question (Clear, unambiguous)	"[T]his research will find that whether a city worth to invest a bigger and better stadium for their professional team." Whether it is "worth it" is probably not an ideal proposition, as "worth" may mean different things to different people.  Presumably the question here is whether municipal investment in major sports stadiums results in local economic growth.  Even then, we would need to specify what is local and what is economic growth.
Relevant Literature	The literature to which you refer is certainly relevant.  More of what is relevant is likely to be found in journal articles (and sometimes in news reports).
Causal Interpretations (clear, all parts defined, mechanisms, controls, plausible)	Well, it is certainly true that the results of developing a new stadium might be economically positive or negative, but that is a rather limited causal analysis.  What conditions might determine which of those outcomes is more likely?
Data (variables, sample, comparison)	As stated, the data description is, at best, incomplete.  You need to specify what outcome (dependent variables) you will examine by what varying causal conditions (independent variables).
Research Value	The general goal of finding if investment in stadiums is rational makes sense only if the outcome is invariant.  It would be more to the point to identify the conditions that distinguish efforts that proved to serve as an economic stimulus from those that did not.
Overall	The general idea behind the study seems fine.  The research design needs some serious thinking.