4. The method according to claim 1 , further comprising: before extracting content information from the micro-blog information to score the micro-blog information, acquiring a preset micro-blog theme category; acquiring a training subset of the micro-blog theme category; and extracting the characteristic of the micro-blog theme category from the training subset.
4. The method according to claim 1 , further comprising: before extracting content information from the micro-blog information to score the micro-blog information, acquiring a preset micro-blog theme category; acquiring a training subset of the micro-blog theme category; and extracting the characteristic of the micro-blog theme category from the training subset. 5. The method according to claim 4 , wherein the acquiring the training subset of the micro-blog theme category comprises: searching micro-blogs using a keyword of the micro-blog theme category, to acquire an initial training subset of the micro-blog theme category; and performing the following steps repeatedly for a preset number of times: determining a high-frequency word in the initial training subset; and searching the micro-blog according to the high-frequency word, and adding a search result into the initial training subset.