How to identify my website passed the load test
What do you mean by passed? It really depends on your expectation when you are doing your load test.
The result of your test will depend on how you setup your scripts and load settings. Is it a performance testings or really a load testing?
For the former, the goal will be to check the response time of your transactions with a specific load for a specific amount of time whereas the latter is more to know how many users the application can handle before having issues.
The notion of "passed" or not is different for each context.