Is verified edx course worth?

To clarify, can it use and submit to admission? Furthermore, can it be used as substitute of AP?

No, it won’t be a substitute AP. It might be used as “hm…this person is intellectually curious about this topic”.

But why do you ask? Is it because your school doesn’t have APs?

Don’t worry about that…your GC will send a “school profile” that discusses what courses are offered.
You can take what your school doesn’t have.

Why I asked this is just curiosity and thanks for your advice!

You are an international student who went to a school that does not offer APs. No college expects you to take courses that are not offered. On top of that, you have already completed HS

Based on your other posts, you have many items working against you:

http://talk.collegeconfidential.com/college-admissions/2084540-can-you-review-my-story-and-future-plan.html#latest

My suggestion to you is to post a thread in the college search and selection forum seeking advice of searching for colleges that may meet your academic and financial needs. But you many many posts come across as trying to throw ideas against a wall to see what sticks. This is not the best strategy, IMO. Good luck.

I’m really appreciate your sincere comment and really rrally sorry if it has made you irritate. Just as most south korean, I really don’t know about US college and furthermore, on American culture. I hope you understand.

To get info on how to apply specifically from S Korea to the US for college, Check on https://educationusa.state.gov/ for an advising center for your country to get info on applying to US colleges.