This talk is about improvement of socket library bundled with Ruby. The current socket library is easy for frequent tasks but it is uselessly difficult for rare tasks. For example, there is a case that we change a class, so that we need to investigate the effect throughout the program. Another example is that binary string is used for socket option, etc. which causes program more difficult than C. This presentation talks a desigh that easy tasks are easy as now and special tasks are easy enough. The imeplementation is already done and will be released in Ruby 1.9.2.